FCC ID: 2AON3-RCS05 Imaging Rader

Document number 14418D27-01 76.5 GHz RCS Imaging Evaluation System

(76.5GHz Imaging RADAR) MODEL : RCS05 FCC ID : 2AON3-RCS05 Instruction Manual Ver. 6.12 April 02, 2019 Keycom Corporation Introduction This manual describes the function outline of the 76.5 GHz RCS Imaging Evaluation System (76.5 GHz Imaging RADAR), the name and description of each part, operating procedures, precautions on use, and so on. Safety Notices CAUTION A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met. WARNING A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met. WARNING There is a reflecting mirror rotating at high speed inside the device, and it is extremely dangerous to use the device by opening the radome or the case. Although the radome and the case are tightened so as not to be opened with TRX Flat Head Screw , . Please note that it will be out of warranty if opened. 1. System overview In this system, reflection distribution from the object to be measured such as automobile can be displayed as an image, and RCS * can be calculated from the measurement result. (RCS *: Radar Cross Section radar reflection cross section, expressed in m 2 in real number, in dBsm in logarithm)

(1) Features of the system

(a) Millimeter wave pulse radar with a center frequency of 76.5 GHz, which is a specific low power device without license.

(b) By using the parabolic mirror rotating at high speed for the reflector of the primary radiator, it is possible to obtain a 3-dimensional wide range image in a short time.

(c) By specifying the horizontal and vertical rectangular range and distance range of the measured image, RCS calculation is possible by selecting the object.

(d) Since all the CLK, IF, and RF signals are phase synchronized and the phase component of the signal is also detected by the IQ Mixer, the data within the specified range is calculated by IQ phase synthesis of the total RCS and the peak value Peak RCS can be calculated.

(2) Definition of coordinates There are three types of coordinate system of the system, polar coordinates, orthogonal coordinates, and cell coordinates. The definition of each coordinate system is explained below. Polar coordinate

(Theta)(Phi)d

(d is the distance from the antenna to the target.) 0 RADAR RADAR Top view Side view 0 Cartesian coordinates x, y, z z RADAR x y RADAR z Top view Side view is the front direction of the radar 1 Cell coordinates P, P P=0,P=40 P=60,P=40 P=60,P=0 P=0,P=0 The cell coordinates are the data cell number of the image screen. In the above figure, the range of horizontal 30 vertical 20 is measured in increments of 0.5 both in the horizontal and vertical directions, and is an example of the cell coordinates when the number N of data in the horizontal direction is 61 and the number M of data in the vertical direction is 41. Correspondence between cell coordinates and polar coordinates

= P* (horizontal measurement angle unit) + horizontal measurement start angle

= P* (measurement unit in the vertical direction) + measurement start angle in the vertical direction The measurement angle unit in the horizontal direction is fixed at 0.5 , and the measurement angle unit in the vertical direction may be 0.5 , 1 , 2 depending on the setting. 2 2. Explanation of each part

(1) Rear Panel LED Power switch USB connector Synchronization signal for camera DC 12 V power connector The cross mark of the photograph is the center position of the mirror No. Name Description 1 2 3 4 5 LED Power switch USB connector Lights up when the power to the device is turned on. This switch turns on / off power. Pressing "" side pushes it ON, pushing "" side turns it OFF. Connects to the measuring computer Connector for inserting the USB cable. Synchronization signal camera for 0 V is output while image synchronization signal data of 4 cameras is being acquired, and 3.3 V is output for the others. DC 12 V power connector This is a 3 pin connector that connects DC 12 V AC adapter.

(2) Front Panel Handle Radome surface No. 1 2 Name Handle Radome surface Used for moving the movable hand tool. Description It is a resin cover that covers the transmission direction surface of the radome surface radio wave. 3 3. Measurement computer requirements The requirements of the measuring computer connected to this system are as follows. No. Item Requirement Remarks 1 2 3 4 5 6 CPU Memory HDD Display I/O OS Intel Core 3 or higher 4G Bytes or more free space 32G Bytes or more resolution 1280 x 1024 dots or more USB 2.0 1 port or more Windows 7, windows 10 recommended 4 4. System startup and shutdown

(1) Start up the system

(a) Connect the instrument main unit and the measuring computer with a USB cable.

(b) Turn on the power switch of the main unit. (Push the "" side of the locker switch in)

(c) Turn on the measuring computer.

(d) When the OS of the measurement computer starts, start the measurement program (76 GHz RCSimaging.exe).

(CAUTION: Start up the measurement program after about 10 seconds elapsed after turning on the power of the unit.)

(2) System termination

(a) Exit the measurement program.

(b) Shut down the measuring computer and turn off the power.

(c) Turn off the main unit's power switch. (Push in the "" side of the locker switch) 5. Preparation for measurement

(1) Installation of the main unit Install the unit in a horizontal position. Point the radome side (resin side) of the main unit toward the object to be measured.

(2) System initialization When you start the measurement program, initialization processing of the main unit will be performed automatically. The initialization process takes about 10 to 20 seconds, during which the wording "On Standby" appears in the message display area. Also, since the key operation of the measurement program does not work, please wait until the end. When initialization processing is completed, the word "Standby OK" is displayed in the message display area.

(3) Setting of automatic saving of csv file (Please refer to Appendix 1 for explanation of csv file.) If you select "Auto save" from the "Settings" menu on the main screen, the following screen will be displayed. Check to save the data to a file while measuring. Specify the folder to save measurement data. Specify a fixed character string to be added to the beginning of the file. The date and time (YYYYMMDDhhmmdd) automatically appends this fixed character string to the file name, and the extension is csv. 5 6. Operation of measurement program The operation of each measurement screen of the measurement program is explained below.

(1) Main screen This is the first screen displayed when starting the measurement program. Operate this screen to perform image data acquisition and RCS calculation operation.

(1)

(8)

(9)

(13 )

(14)

(10)

(11)

(15)

(6)

(12)

(7)

(2)

(3)

(4)

(5) No.

(1) Name Image display area

(2) Title

(3) Comment

(4) Distance range Operation explanation This is an image display area where image images and graphs of measurement data are displayed. Enter the name of the measurement. This input is saved in the measurement data file. Enter comments on measurement. This input is saved in the measurement data file. Enter the distance range for which you want to measure the image. Received signals outside the distance range are not displayed and are not used for calculation. It can be set between 3 m and 55 m. Recalculate Click the Recalculate button when changing the distance range.

(5) Image This area allows you to make settings for displaying images. Max Level /Min Level Specify the maximum value and minimum value of the image display level. Redraw Click this to re-display the image. Cell frame display When checked, a border appears on the cell border of the image. Axis Fit To Screen Distance specification When checked, in the image display, theaxis is expanded to fill the screen in the same way as 10 regardless of the set angle of the tilt. You can drag the slide bar and display the image of the cross section with the distance specified in units of 15 cm in the image display area.

(6) P (d) Graph This area can be used to display the P (d) Graph of the relationship 6 No. Name Operation explanation between distance and received power. P/P Specify the cell coordinates on the screen for which you want to display the P (d)graph. You can also specify it by clicking on the image screen. Graph display Click to display the P (d) Graph.

(7) P (x) graph A graph can be displayed on the relationship between the x coordinate calculated from and distance d and received power. It is an area where setting for that is done. Specify the tilt angle for displaying the P (x) graph. Detection distance range in the distance direction can be specified in units of 0.15 m within the range of 0 to 1.5 m. You can drag the slide bar in the specified tilt direction and display the intensity graph in the X axis direction specified distance in 15 cm increments. When specifying the detection range other than 0 m, this distance specification is the median value. Tilt Detecting Range Distance specification Graph display Click to display the P (x) graph.

(8) range

(Vertical tilt range)

(9) Number of Measurement

(10) Start Turning Motor /

Stop Turning Motor

(Turning motor rotation)

(11) Start Measurement /

Stop Measurement

(12) Save As Image

(Save image data)

(13) RCS Reference

(Reference value) Click to specify the measurement range of the tilt angle. As a guide S: Short range (within about 10 m) is 10 M: Middle range (within about 20 m) is 5 L: Long range (about 40 m or less) is 2.5 Hold horizontally (Fix) for more than 40 m. In the case of S, M, L, the range of the tilt angle set while the mirror turns 11 is scanned and measurement is completed. S = 2 , M = 1 and L = 0.5 for the tilt angle. SH and MH are high definition mode measuring tilt in increments of 0.5 , SH is 41 turns and MH is 21 turns to scan one screen. By checking "specify", you can specify the number of times to acquire image data. When "Continuous" is checked, image data is continuously acquired until "Stop Measurement" button is pressed. Click to start turning the parabolic mirror. While turning, "Stop Turning Motor" is displayed, and you can stop turning the parabolic mirror by clicking. Click to start acquiring image data. During data acquisition, "Stop Measurement" is displayed, and you can click to end data acquisition. Data in the image display area can be saved as bitmap data or JPEG data. Click to capture the reflected received power of a known RCS corner reflector as a reference to the system. (For details, see 7 (1))

(14) Target Click to calculate the RCS value of the target. (For details, see 7 (2))

(15) Message display area A message about the operation of the system is displayed. 7 Setting parameters Open the "Settings" menu on the main screen. When "Parameter Setting 1" is selected, the following screen will be displayed.

"Settings" menu The items that can be entered on the above screen are parameters related to the operation of the system, so there is no need to change it. If the system is operating normally, please do not change the value. To change the setting please enter the password

"keycom123". A description of each parameter is explained in Appendix 2. 8 Setting of turning motor When you select " Parameter Setting 2 (Setting of turning motor) " from "Settings" on the main screen, the following screen will be displayed. Items that can be entered on the above screen are parameters related to timing of measurement, so there is no need to change. If the system is operating normally, please do not change the value.A description of each parameter is explained in Appendix 2. Scale change screen While the P (d) or P (x) graph is displayed in the image display area, the following screen will be displayed if you select Scale (graph scale) from the Settings menu on the main screen. For the graph displayed on the main screen, it is possible to specify the maximum value, the minimum value, and the increment of the scale for each axis. Measurement procedure To acquire image data, follow the procedure below. Start the measurement program. Wait until the initialization process ends. After that, set measurement parameters such as Title, comment, distance range, range, number of measurements. Click the "Start Turning Motor" button and rotate the rotating mirror. (Please wait for about 5 seconds until the rotation stabilizes.) 9 Click the "Start Measurement" button to start acquiring data. If necessary, set the Max Level /Min Level of the image, Distance specifications, the P(d)/P(x) graph display. Saving measured data (For each saved data format, refer to Appendix 1.) In addition to performing automatic saving of measured data, you can also execute it from the File menu. There are the following three types of storage.

(a) Save the latest acquired data in raw data format Select "Save as raw data" from the "File" menu on the main screen. The measured data is saved in CSV format. In this case, only one image data is saved.

(b) Save multiple measured data (Multiple File) Select "Save as Multiple File" from the "File" menu. Measurement data stored in memory is saved in CSV format. Up to 1000 image data can be stored in the memory. A serial number is automatically assigned to the file name, and a file is created for each image data. The contents of the memory are cleared each time the "Start Measurement" button is clicked.

(c) Save as bitmap or JPEG Select Save as image from the File menu. The same operation can be done from the Save as image button on the main screen. 10 Acquisition of RCS Acquiring the targets RCS value is done in the following two steps.

(1) Reference measurement of target with known RCS value

(2) Measurement of RCS value unknown targets and RCS calculation The operation of each step is explained below.

(1) Measure reference with known RCS value Measure the reflected reception power of the object to be measured (known target, CR corner reflector, etc.) whose RCS value is already known and store it in the measuring device as a reference with correspondence between RCS value and received power. In order to calculate the RCS value by measuring the measurement object whose RCS value is unknown, it is necessary to memorize this reference in advance. Measure the distance between the radar and the known target , set the distance range slightly longer so that the reflected signal of the target comes in the distance range in consideration of the transmission pulse width (75 cm) of the radar. And then acquire 2D imaging data.

(Note) Even if it is a point target like a CR, its Tx pulse width is 5 ns, and there is a received signal with a width of more than 75cm in the distance direction. Please click the Recalculate button when changing distance range. Drag the mouse in the image display area and place the target within the rectangular area. Hold the left button and move the mouse. Release the left button here. By designating the range like this, it is possible to measure only the reflected signal of the desired target (CR).

(Reference) To check the actual , angle of the specified rectangular range, you can check the angles of the start and end points by opening the setting and clicking Specify Rectangle Range as shown below. (It is also possible to specify by specifying an angle at the start point and the end point of this rectangular range specification.) Enter the measured distance (m) of CR in the "measured distance" field of the " RCS Reference" frame, enter the known RCS value (dBsm) in the "RCS value input" field. When clicking the Get Reference button, the values of the "total received power value (Total Power)" field, the "peak power value (Peak Power)" field and the "RCS value 11 input (Reference RCS) It is reflected in the system as a reference. Enter the RCS value (dBsm) for the reference here. Enter the actual distance of the reference here. The maximum value of the received power value which is phase-synthesized at the same distance and averaged at the selected range is displayed. The maximum peak value of the measured received power value is displayed. Click here to reflect the reference.

(Note: The value obtained here is saved in the measuring device (personal computer software) until new reference is obtained.) For confirmation, enter the same distance (m) as the reference in the "Distance" field of the "Target" frame with the distance range and rectangle range intact and "RCS calculation (Calculate RCS) "button is clicked, the calculated values are displayed in the" total reception power (Total Power) "field, the" peak power value (Peak Power) "field and the"

RCS value result (RCS Result) " Confirm that the RCS value entered in the "Reference value (RCS Reference)" frame and the measured and calculated RCS value of the "Target" frame almost agree. In the case of a point target like CR, both Total RCS value and Peak RCS value almost agree. (See the figure below) The maximum value of the received power value The RCS value calculated from the maximum value of the phase synthesized received power value of the same distance is displayed. Enter the same distance (4m) as the reference for confirmation which is phase-synthesized at the same distance and averaged at the selected range is displayed. The maximum peak value of the measured received power value is displayed. The RCS values calculated from the maximum peak value are displayed. Click to display the calculation results in "Total Power", "Peak Power" and "RCS Result". Measurement of RCS value unknown targets and RCS calculation Measure the reflected reception power of the measurement object whose RCS value is not known and calculate the RCS based on the measurement result and the RCS reference stored in (1). (Caution) Please keep the unknown target at the same distance as the REF measurement distance, preferably as much as possible from the REF measurement time without measuring time. (When distance is different, distance correction of RCS value by radar equation is performed and measurement is done, but please include including some error when REF measurement environment and target measurement environment time are different.) In the same way as (1) below Estimate the distance between the radar and the unknown target, set the measurement range in the distance direction (Distance Range) slightly longer in consideration of the transmit pulse width (75 cm) of the radar, and then acquire the 2D imaging data. Please click the Recalculate button when changing distance range. If the REF measurement distance is different from the target measurement distance, measure the distance of the target or click the cell at the center of the target to be measured in the image display area to display the P (d) graph and set the target distance to Confirm and change "Distance (m)" in "Target" frame. The distance of the pulse radar 12 is read at the rising edge of the pulse, but the distance of the point where the amplitude exceeds 80% of the peak and the point where the power exceeds the peak of -2 dB is taken as the measurement distance of the IM radar. As an example, the P (d) graph of the target at 5.5 m is shown below. When you click the -2 dB point of the peak, the measured distance is displayed at the bottom of the screen. P (d) graph display of 5.5 m target

(Since the Distance scale is set to -2 m ~, the transmission leakage is visible to 0 m.) Drag the mouse in the image display area and place the target within the rectangular area. Finally, clicking the "Calculate RCS" button in the "Target" frame displays the calculated values in the "Total Power", "RCS result" field, "Peak Power" and "RCS result" fields. Measurement example of target with unknown RCS value (actually CR 10 dBsm) with distance (5.5 m) different from REF measurement distance. Even if the distance changes, the RCS measurement results almost agree.

[Reference] The following figure shows the signal intensity distribution in the horizontal direction in which the tilt + 3.5 distance designation is dragged to 5.7 m in the above figure and P (x) graph is displayed. 13 Use of past measurement data In this system, it is possible to read the data file of the reference and the target previously measured and saved. (You can only read CSV files.) For example, it can be used to read past reference data and measure the RCS of a new target based on it. To read the data file, follow the procedure below. Select "Open" from the "File" menu on the main screen and open the saved file. Since the file is reproduced in the state immediately after the file is measured on the main screen, all operation /

RCS calculation described in 7 above becomes possible. However, 0 m point correction value, distance range, rectangular range, target distance, RCS calculation result are read from the reproduced CSV data and displayed, but the REF data is not read and the previous reference value of the IM radar display software was acquired The data of time is left. To reproduce the REF data that acquired the reference value and measure the RCS of another target, correctly input the measured distance of the reference value on the REF reproduction screen, and then input the reference value acquisition button without changing the distance range and rectangular range After clicking to reflect the REF, read the CSV file of another target, specify the distance range, the rectangular range, the target distance and then measure the RCS. Please click the Recalculate button when changing distance range. Difference between Total RCS and Peak RCS Peak RCS value calculation method The method of using the maximum reflection level in the rectangular range and distance (time) range for calculation as the RCS of that target. Specifically, convert the I and Q components of each cell selected in the rectangular range and distance (time) range to amplitude, and select the maximum amplitude max from among them. Calculate the RCS value by converting the amplitude max to the power value and then comparing it with the REF power value. Calculation method of Total RCS value It is a calculation method that takes into consideration that I and Q signals received at the same time in the selected rectangular range and distance (time) range should be phased. When the distance between the radar and the target is long, the I and Q signals at the same time on the entire target are phase synthesized. If the distance is short, the I and 14 Q signals at the same time in the rectangular range of a part of the target are phase synthesized. In this method, the range synthesized by the beam width of the actual radar is different, so it is necessary to take this point into consideration in the short range. I and Q signals at the same time in the selected rectangular range are phase synthesized and multiple amplitude values are obtained within the selected distance (time) range. We select the maximum amplitude in the distance (time) range and set the RCS value calculated by the phase-synthesized I and Q signals as the RCS of that target. Calculate the RCS value by converting the amplitude max to the power value and then comparing it with the REF power value. Difference between Total RCS and Peak RCS As you can see from the above explanation, Peak RCS is the largest one among the selected rectangular range and distance (time) range, so even if you change the range somewhat, there is not much variation. To the contrary, since Total RCS is calculated by phase combination of I and Q components within the rectangular range and distance (time) range, the calculated value changes by changing the rectangular range and distance (time) range, but the rectangular range and By appropriately setting the distance (time) range, it is thought that calculation results close to those measured by actual radar can be obtained. Usage notes Since the radome on the front of the equipment is a 0.1 mm Teflon sheet, please handle it carefully so as not to damage it. Especially when packing and transporting, please apply a protective plate so that pressure is not applied to the radome side. If the operation stops for some reason during measurement, turn off the power of all the devices and turn the power on again. To terminate the measurement program and restart it, please turn on the power of the main unit again according to the following procedure. Terminate the measurement program. Turn off the power of the main unit. Turn on the power of the main unit. Wait approximately 10 seconds to start the measurement program. Since the main body of the device is not waterproofed, please be careful that there is no water wetting etc. Do not operate the machine by tilting it. Failure to do so may result. If the initialization operation does not end even after launching the software, turn off the power, insert a thin rod from the 3 adjustment hole at the bottom of the radome, level the mirror manually, then turn the power back on.

(It may not be possible to start if the mirror is inclined.) 3 adjustment hole Connect other antennas and transmitters to this radar and do not install or operate it. CAUTION This equipment complies with the FCC radiation exposure limitation stated on an uncontrolled environment and meets the FCC Radio Exposure Guidelines. Please leave this device 20 cm or more away from the human body and install and operate it. 15 specification Model name RCS05 Frequency 76.5GHz (76-77GHz) Occupied frequency bandwidth: 1GHz RF Output Power

+ 6dBm typ. (+8+4dBm) Ant gain: 35dBi EIRP: +41dBm typ. (+43+39dBm) Radar system Pulse radar Emission identifier: P0N pulse width: 5ns pulse repetition frequency:1MHz Rated Supply Voltage +12V DC Horizontal Detection angle Angle steps for horizontal Angle resolution Sensitivity for distance(RCS10dBsm) 33 0.5 3 50m Accuracy for distance 15cm Resolution for distance 1m Display Image RCS of an object or enclosed part Signal strength of specified part Record 2D dataGet on screen refresh time 3D dataYou need the HDD. You need ten times the time in 2D data External output Clock output for camera synchronization (for shooting radar screens and camera photos at the same time) Vertical Detection angle 20 Angle steps for horizontal 2 Screen Refresh Time 0.9 seconds Angle steps for horizontal 0.5 Screen Refresh Time 4 seconds Vertical Detection angle 10 Angle steps for horizontal 1 Screen Refresh Time 0.8 seconds Angle steps for horizontal0.5 Screen Refresh Time 2 seconds Vertical Detection angle 5 Angle steps for horizontal 0.5 Screen Refresh Time 0.7 seconds Vertical Detection angle 0 Screen Refresh Time 0.1 seconds 16 Multiple File Header section

(Appendix 1) Data format of saved files Multiple File format The measurement data file is a text file in CSV format and can be read by spreadsheet software such as Excel. The structure in the file is as follows, one file is created every time the image data is scanned once. Each part will be explained below. Header section Two-dimensional display section Rectangular range data section Measurement data section File ID:

Title:

RI76G0301 CR-a=130mm file identifier Measurement name Date/Time:

2011/12/13 18:48:14 Measurement date and time Comment:

Corner reflector a = 130 mm Comment Frequency[GHz]: 76.5 Range Min[m]:

Max[m]:

5 10 Number of Data Points Theta:

Phi:

Start Point Theta[deg]:

Phi[deg]:

Stop Point Theta[deg]:

Phi[deg]:

Increment 61 direction N 11 M

-15

-10 15 10 Theta[deg]:

0.5 Phi[deg]:

Reference 2 Transmission frequency Distance range number of data points in the horizontal number of data points in the vertical direction Measurement start angle measurement end angle measurement angle unit Reference with known RCS value Power[dBm]:

8.266

-4.219 (total power, peak power) RCS[dBsm]:

-10 Distance[m]:

4 Actual measured distance of reference 17 Target target with unknown RCS value Power[dBm]:

9.70802 -4.154127 (total power, peak power) RCS[dBsm]:

-0.05798 -1.435127 Distance[m]:

4 measured distance or measured distance of target by IM radar or estimated distance Measurement data section Maximum value data is stored as one coordinate on one row Theta Phi d I Q AMP POWER coordinate (unit: ) coordinate (unit: ) Distance of maximum value (unit: m) I value of I / Q detection (digital value obtained from A / D converter) Q value of I / Q detection (digital value obtained from A / D converter) Amplitude value (digital value) of voltage obtained from I / Q value Received power value (dBm) obtained from POWER I / Q value Rectangular range data section Rectangle Start Theta:

Start Phi:

Stop Theta:

Stop Phi:

Freq[GHz] for Calc.: Frequency when calculating reference value and RCS value Rectangular area selected during RCS calculation start angle of the rectangular area (unit: ) start angle of the rectangular area (unit: ) end angle of the rectangular area (unit: ) end angle of the rectangular area (unit: ) Two-dimensional display section Here, the received power value (dBm) for each measuring point is expressed in two-dimensional form. The horizontal axis is the direction and the vertical axis is thedirection. 18 Format of raw data file The raw data file is a text file in CSV format and can be read by spreadsheet software such as Excel. The configuration in the file is as follows, and the data for one scan of the image data is recorded. raw data file Header section Measurement data section Same as the format of multiple file Rectangular range data section Two-dimensional display section Since the first header part to the two-dimensional display part have the same format as the measurement data file, the explanation is omitted. Each item of the raw data section is explained below. header of raw data Data section of raw data header of raw data Pulse Width 1 used. It is a value representing pulse width, but ignore it because it is not Distance Offset 90

"0 m point correction value" on the parameter setting screen Up(1)/Down(0) 0 Flag indicating the tilt direction Scanning in the upward Scanning in the downward: 0 Data section of raw data Theta Position Phi Position Sample Number Cell coordinate P Cell coordinate P Sampling number I Q Amp I value of I / Q detection (digital value obtained from A / D converter) Q value of I / Q detection (digital value obtained from A / D converter) Amplitude value (digital value) of voltage obtained from I / Q value 19

(Appendix 2) Explanation of system parameters Parameters related to the operation of this system can be set from the screen. These parameters are described below. Parameter setting 1 No. 1 Name Limit sensor upper end Digital filter proportional term This is the proportional term of the digital filter of the tilt motor. Digital filter integral term This is the integral term of the digital filter of the tilt motor. Description The angle from the upper limit sensor position to the horizontal position in the tilt motion is expressed as the product of the motor moving step number (3000) and the gear ratio (19). One tilt rotation

(360 ) corresponds to 57 thousand steps. The speed of the tilt motor is expressed in rpm. The tilt motor acceleration is expressed as Rev / s2. As the upper end of the movement range in the tilt motion, the angle from the horizontal position is expressed by the number of moving steps of the motor. One tilt rotation (360 ) corresponds to 57 thousand steps. As the lower end of the movement range in the tilt motion, the angle from the horizontal position is expressed by the number of moving steps of the motor.One tilt rotation (360 ) corresponds to 57 thousand steps. As the upper end of the measurement range in the tilt motion, the angle from the horizontal position is expressed by the encoder step number. One encoder revolution (360 ) corresponds to 8192 steps. As the lower end of the measurement range in the tilt motion, the angle from the horizontal position is expressed by the encoder step number. One encoder revolution (360 ) corresponds to 8192 steps. This is an adjustment value to adjust the measurement distance. This represents discrete value of the sampling distance. This is an offset adjustment value for I signal. (It is normally 0) This is an offset adjustment value for the Q signal. (It is normally 0) Tilt speed (RPM) Tilt acceleration (Rev / s 2) Overshoot upper end 7 Overshoot lower end 8 Measurement upper end Measurement bottom end position 0 m Point correction value sampling resolution (m) I Signal offset Q signal offset 2 3 4 5 6 9 10 11 12 13 14 15 16 17 ADC input impedance Indicates the input impedance of the A / D converter. ADC full-scale voltage This is the voltage range of the A / D converter used in this device. Antenna attenuation loss This represents the attenuation loss value of the antenna. Measurement time interval If it is necessary to keep the measurement interval constant, specify the repetition time of measuring one image longer than the actual measurement time. If the specified measurement interval is shorter than the actual measurement time, the latter is applied. Parameter Setting 2 (Setting of turning motor) No. 1 Measurement start delay time Name Description This is the delay time from the heading sensor detection in the turning direction to the start of data acquisition. (It is a unit of 20 seconds) 2 Interval Frame Number The number of frames averaged.

(Appendix 3) Maintain settings Various setting values are saved in the file named initRADAR.dat. When you log in to a personal computer with a user name and install a software from the CD-ROM, the initial initRADAR.dat is also saved in the same folder as the software exe file is. When you start up the software after installation, the software reads initRADAR.dat. But when you exit from the software, initRADAR.dat is saved in a different folder which is automatically specified by your personal computers OS according to user names. If you log in to the computer with the same user name as the one named when you installed the software, it reads the saved initRADAR.dat and the setting value you saved last time is reproduced. When you changed some settings, the various setting values are automatically saved in initRADAR.dat when you exit from the software.

(Note) If you log into the computer with a different user name from the one which was named when the software was installed and you do not have rights to access to the folder where the initRADAR.dat is, various setting values may not be automatically saved in initRADAR.dat when you exit from the software. 21