Quick Installation Guide Quick Installation Guide Version 1.3 September 2020 HELZEL Messtechnik GmbH Carl-Benz-Strasse 9 24568 Kaltenkirchen, Germany www.helzel.com e-mail: wera@helzel.com Tel.
Quick Installation Guide 1.1 Intended Use and Safety Instructions The WERA system is a short wave radar device for oceanographic applications. To run the system the user has to get an official permission from the local authorities to operate radio wave transmitting systems. This system complies with part 15 of the FCC rules. Operation is subject to the condition that this system does not cause harmful interference. The WERA system is designed for radar measurements at the ocean coast line.
Quick Installation Guide The system must be installed by skilled personnel using calibrated HF test instruments. The radiated HF power must be kept below the defined maximum radiation power for Ocean Radar of 50 W ERIP (47 dBm). Please note that the WERA power amplifier is capable to provide up to 49 dBm to compensate for cable losses for cases with the Tx antenna system installed in a distance of several 100 Meters.
Quick Installation Guide 4. WERA Hardware 0.0 – User Interface PC 1.0 – Frequency Control Rack 1.1 – CLK 1.2 – SRX 1.3 – STX 1.4 – SDU 1.5 – STM 1.6 – ADC 1.7 – ADU 2.0 – REceiver Rack 2.1 – REC 1 to 12 3.0 – Power Amplifier 3.
Quick Installation Guide 1.0 – Frequency Control Rack 1.8 – Main AC input & Switch 1.9 – DIO72 1.10 – RTU CPCI computer 1.11 – Voltage Status Display 1.12 – Ethernet Connection 1.13 – Control I/O 1.14 – Data I/O 1.15 – Test, I/O (for test only) 1.16 – RF-Driver (RFD) 1.17 – Control Unit (CTU) 1.18 – Control-Status (RSC-Logic) 1.19 – Control Power (RSC-230V) Figure 2: Back view, WERA FCR 2.0 – REceiver Rack 2.7 – Status RER 2.1 – RER power control 2.2 – RER control input 2.3 – Cal input 2.4 – LoD input 2.
Quick Installation Guide 2.0 – REceiver Rack 2.7 – Status RER 2.1 – RER power control 2.2 – RER control input 2.3 – LO input 2.4 – 20 V output 2.5 – Antenna input 1 .. 12 2.6 – AC input Figure 3.3: Back view, WERA RER (12 channels) – Version with external Filters (on AIP) 4.1 WERA-FCR FrequencyControlRack Figure 4: FCR Block Diagram The frequency control rack generates all required rf signals (clock and sweep) and provide the Tx and Lo signals.
Quick Installation Guide 4.2 Clock - CLK 1.1.0 – SYNC antenna, for clock only. CLK 1.1.1 – Clock signal out, to be connected to STM 1.1.2 – Trigger signal out, to be connected to STM Figure 5: Clock Module Master clock for the whole WERA system The standard module has got one clock and trigger output only. The third connector is for the SYNC antenna only (option). 4.3 Sweep-RX - SRX / 4.4 Sweep-TX - STX 1.2.
Quick Installation Guide The sweep modules generate the transmit (TX) and receive (RX) signals for the measurement. Normally their output is a linearly swept frequency sweep. In the newer WERA versions (since 2009) just the Rx sweep is active during acquisition. The Tx is used for calibration only and can be used as a “spare part” in case of a failure of the Rx sweep. The sweep dummy is an empty housing in an unused sweep module slot of the FCR.
Quick Installation Guide 4.5 A/D converter - ADC 1.6.4 – Analog signal in, N+3 1.6.3 – Analog signal in, N+2 1.6.2 – Analog signal in, N+1 1.6.1 – Analog signal in, N 1.6.5 – LED indicates sampling Figure 8: ADC Module Each ADC module samples I and Q information of four receive channels.
Quick Installation Guide 4.6 WERA-RTU - WERA Real-Time-Unit On newer versions: DVI instead of VGA For visual troubleshooting information connect monitor here. Ethernet connection To user interface pc Figure 9: RTU Module The real time unit controls data acquisition and stores measurement data on the user interface pc. It communicates with the user interface pc and forwards all needed parameters to the control unit. 4.
Quick Installation Guide 4.8 WERA-RSC - WERA Remote & Status Control 1.11 – Control-Status (RSC-Logic) Connection to Power Amp. Connection to RER Connection to user PC Optional connection to 2 nd RER Control Power (RSC-230V) 1.12 – Control Power (RSC-230V) Figure 10: Remote & Status Control Modules (RSC 230 & RSC Logic) The RSC Logic module is connected to the WERA Interface PC via the LPT port. Through this connection system settings are programmed and system status can be monitored.
Quick Installation Guide 4.10.1 WERA-RER - Receiver Rack (12 channels) – external filter Figure 12: RER Block Diagram for 12 channels (external filter) The receiver rack holds the input filters and receiver modules of up to 12 channels. For this version the Receiver Input Filters (RIN filters, chapter 4.11) and the Calibration Splitter Unit (Cal-Splitter, chapter 4.12) are mounted on the Antenna Interface Plate (AIP). 4.10.
Quick Installation Guide 4.10.3 WERA-RER - Receiver Rack (8 channels) +9 ±1dBm Figure 14: RER Block Diagram for 8 channels The receiver rack holds the input filters and receiver modules of up to 8 channels. For a system with 16 receive channel you always need two receiver racks, each containing 8 receiver. 4.11.
Quick Installation Guide 4.11.2 Receive-Input-Filter - RIN6 (for 12 channels) – internal Filter Version Figure 16: RIN Module Each RIN module contains band-pass input filters for six receive channels as well as the relays for the internal calibration. The filter is designed for a specific frequency and bandwidth to provide optimum noise reduction. In addition to that these modules contain the last lightning protection fuses.
Quick Installation Guide 4.11.4 Dual-Receive-Input-Filter - DRIN (for 8 channels) Each RIN module contains band-pass input filters for four receive channels as well as the relays for the internal calibration and switching filters. Each of the two filters per channel is designed for a specific frequency and bandwidth to provide optimum noise reduction. From the outside, the DRIN is mechanically and optically identical to a normal RIN module and is also connected in the same way.
Quick Installation Guide 4.13 Receiver - REC 2.1.1 – trimmer for i/q phase -> fine-adjustment 2.1.2 – Analog signal out to ADC Figure 19: Receiver Module The receiver modules receive the antenna signal over the receiver input filters, mix it down in frequency and amplify it for the ADC modules. Note: The thinner 12 Channel REC have a pre-mounted ADC-cable instead of a detachable one.
Quick Installation Guide 4.14 WERA-PA - Power Amplifier (Rack Version) The standard version of the power amplifier is housed in 19” rack, 3 HU, see figure 21. This version can provide up to 80 Watts output power to compensate cable loss. The antennas should be connected via an external 1:4 power splitter with two pairs of “phase cables”, the longer cables are always used to connect those antennas which are located closer to the water front.
Quick Installation Guide 4.1 – PA-Rack rear 4.3 – Transmit signal TX in 4.4– Voltage selector For new versions this function is disabled 4.5 – AC in 4.6 – Transmit signal out (4 identical signals) newer WERA versions will only have 1 transmit signal out as the signal will be splitted at the power splitter at the TX area 4.7 – Dual Frequency Feature Not shown in picture or functional diagram: - A dual frequency PA provides one TX input and two separate TX-Outputs (one for each frequency).
Quick Installation Guide 4.16 Block Diagrams and Table of Interconnecting Cable Cable Id Description Quant. Connect to Connect to PA Control (15 poles male-female) 1511 1 1.21 3.2 310 1 Line UPS AC Power of the whole WERA System 1511 1 (2) 2.7 3.7/8 Status control RER 1653 1 UPS 3.4 AC power cable 1 m for FCR 1653 1 (2) 2.6 3.4 AC power cable 1 m for RER 1938 1 (2) 1.20 2.2 RER Control (9 poles male-female) 1965 1 1.17 keyboard 2173 1 1.
Quick Installation Guide Figure 24: Block Diagram WERA IV 12 Channel with AIP (external Filters) Part 1 of 2 Document WERA4-Quick-US-200918 Page 20 of 73
Quick Installation Guide Figure 25: Block Diagram WERA IV 12 Channel with AIP (external Filters) Part 2 of 2 Document WERA4-Quick-US-200918 Page 21 of 73
Quick Installation Guide Figure 26: Block Diagram WERA IV 8 or 12 Channel with RIN or RIN6 (internal Filters) Part 1 of 2 Document WERA4-Quick-US-200918 Page 22 of 73
Quick Installation Guide Figure 27: Block Diagram WERA IV 8 or12 Channel with RIN or RIN6 (internal Filters) Part 2 of 2 Document WERA4-Quick-US-200918 Page 23 of 73
Quick Installation Guide Note: All the delivered cables have identification numbers. Plug in all the cable (given in table 1) fig. 9 and refer to fig. 1 to 8 Take care for the correct order of connection of cable 9026 for REC and ADC. The REC`s are numbered from left to right, the ADC inputs are numbered from bottom to top and left to right, for example: 1.6.4 – Channel 4 1.6.4 – Channel 8 1.6.1 – Channel 5 1.6.1 – Channel 1 2.1.2 – Channel 8 2.1.
Quick Installation Guide Take care for the correct connection of cable 9028 for DIO72 and control port. The DIO72, #1 is the left one. The two flat cables are marked with A and B. A crossed LAN cable 2173 is needed to connect the RTU with the external PC. It’s optional to plug the Y-cable 1965 in the PS2 socket of the RTU to connect keyboard and mouse. Newer ones support USB mouse/keyboard. A standard extension flex cable is used to connect the control ports in between the racks.
Quick Installation Guide 1.0 – WERA Interface PC 2.0 – FCR 3.0 – RER 4.0 – Blind plate for ventilation 5.0 – Power Amplifier 5.
Quick Installation Guide 4.17 Uninterrupted Power Supply (UPS) It is strongly recommended to operate the WERA from an UPS unit. At least the WERA User Interface PC should be connected to such a unit to guarantee a controlled and safe ramping down of the PC in case of a power failure. The hard- and software of the ups needs to be configured to safely shut down the PC in case of a longer power loss. So a data link and software between the PC and ups is required.
Quick Installation Guide 5. Installation and Tune Up Information This table shows all installation steps in an order as they should be carried out. On the following pages some more details can be found.
Quick Installation Guide 5.1 Position of Container If possible find a place for the container in-line or behind the antenna arrays. It is possible to use the roof of the container to place the TX array. In this case the container should be placed in line or in front of the Rx array. The container needs to be placed at least 20 cm above ground due to the opening for the cables is in the floor. The fundament can be made with brig stones or wooden beams. 5.
Quick Installation Guide Tx Antennas The optimum position of the Tx antenna array is in a distance of 5 to 10 Lambda from the Rx array orientated in-line with the Rx array.
Quick Installation Guide The Tx array geometry defines the Tx beam pattern. The rectangular configuration with 0.5 Lambda along the water front and 0.15 Lambda perpendicular provides a theoretical null towards the Rx array and a quite narrow beam towards the bore sight of the radar. At the outer edges (± 60°) the Tx signal is already attenuated by more than 10 dB. For this reason the optimum Tx geometry is 0.35 to 0.45 Lambda x 0.15 Lambda.
Quick Installation Guide The kind of connection of the Tx array depends on the distance between the Tx array position and the container. If this distance is very long, the RF power loss on the coax cable can be quite high. The cable loss depends on the distance, frequency and cable type. Please refer to the “WERA Tables” to check if for your installation this cable loss can be accepted.
Quick Installation Guide The typical antenna construction is sketched on the left, the right schematic shows an antenna geometry, suited for the installation on a mole. The “mirror” pole would suppress the signal from the other side of the array. A lot of other antenna construction versions are available, please contact the Wera team.
Quick Installation Guide 5.7 Antenna Tuning 5.6.1 Rx-Antenna Tuning The antenna tuning coils should be installed with contact grease and secured by means of the hose clamps. Please attach just loose for the first step, since the depth of shifting in the tuning coil into the pole will be used for fine tuning later on. Ensure that the ends of antenna poles (tubes) are clean inside and free of an oxide layer. If required clean with a metal brush.
Quick Installation Guide The antennas should be tuned to the intended working frequency and it needs to be matched to 50 , low VSWR over a wide bandwidth > 500 kHz. Please note, always use a cable of at least ¼ wave length to connect the antenna meter. Layout this test cable almost identical to the proposed layout for the final connection, otherwise the readings will be incorrect. As test cable the longer one of the phase cables for the Tx array can be used.
Quick Installation Guide The Tx antenna tuning is slightly different from the Rx tuning because due to the fact that 4 antennas are located very close to each other, these antennas will affect each other. For this reason it is recommended to install just one Tx antenna first and tune it without having another Tx antenna mounted. This Tx antenna should be tunes very similar to the Rx antennas. Now leave the Tx array with just this one Tx antenna mounted and tuned. 5.
Quick Installation Guide The user interface PC will be delivered with an additional transportation protection inside. This protection needs to be removed before switching on. Keep this protection material for future transportation. If the system is connected correctly, the user interface PC is directly connected to the UPS and can be started without switching on the WERA system. Turn on the PC and wait until Linux has booted. Please check if there is access to WERA Desk.
Quick Installation Guide 5.11.3 Cable Calibration This calibration is essential for the operation of the WERA system. Normally this calibration was already carried out at the factory. In that case the calibration is already activated and should not be run again! If the cable calibration needs to be carried out in the field, there are several options. 5.11.3.1 Calibration with Calibration Box (1:16 Splitter) All cable ends should be labelled with the correct receiver channel number.
Quick Installation Guide Some portable spectrum analyzers like the Rohde & Schwarz FSH3 with build-in tracking generator got the option to measure phases relative to a calibrated reference cable after performing an open/short/load calibration at the end of the reference cable. There is a separate document describing in detail how to perform such a calibration measurement with this analyzer model. See the document “WERA-Cable-calibration_using FSH3-150907.pdf” for details.
Quick Installation Guide If one voltage is higher, check if the PA is really operating with lowest gain. If the power need to be further reduced, connect a 20 dB N-attenuator (enclosed in the tool box) at the input of the PA and run the test again. Now the voltage must be smaller than 7 volts but maybe now it is lower than 1 volts. In that case you may need to increase the gain of the PA (1 step of the knob to the right is +3 dB).
Quick Installation Guide When all cables are in their final position and connected to the Splitter the final tuning starts: 1. Connect the already tuned antenna to the antenna meter and check the tuning. Most likely it has changed and a re-tuning is required. 2. Reconnect the first antenna to the Splitter to ensure a correct load and proceed to the next antenna for tuning. 3. Reconnect the second antenna to the Splitter and proceed with the next antenna. 4.
Quick Installation Guide 5.15 Adjust Power Amplifier (PA) level (Tune Up Info Part I) There are two power amplifier versions available. The outdoor version in a water proof box and a rack mount version. The rack mount version is easy to handle because all displays and knobs are at the front panel. To access the knobs, the transparent lid can be removed (this is to prevent any accidentally “adjustments”).
Quick Installation Guide - Increase the gain by one step and run a calibration again. Please check the power level LED at the PA, do not increase the power further when the second green LED is on. Attention: Always check the output power value to ensure that the level is kept below the calculated max PA output power limit. Attention: Always check that at the PA no red LED is on. In that case reset the PA before the next calibration cycle is started.
Quick Installation Guide 5.17 Fill-in check list With the finally optimised PA settings one more short calibration with 80 Hz offset should be run. Use the checklist (see attachments) to fill in the measured values. We recommend to use this check list for regular system checks. 5.18 Seal connectors Now all outdoor connectors should be sealed. Also all antenna coils if not yet done. 5.19 Run single acquisition The system performance can be checked now by running a single acquisition.
Quick Installation Guide 7. Software Technical User Guides 7.1 WERA-Desk Control Center To start WeraDesk from a browser, enter the following URL: http://localhost/~wera/WeraDesk.html This page is password protected, please ask for username and password and note this combination at the station and in a safe place in your office. The WeraDesk web page can be used to control the system, perform measurements or configure repetitive automatic measurement cycles.
Quick Installation Guide 7.1.
Quick Installation Guide 7.1.3 Process after Measurement WERA Desk provides three options of automatic post processing new WERA data. If the sea echoes check box is marked, the script located at /home/wera/etc/process_SORT.sh is executed at the end of an acquisition measurement cycle. This script can e.g. process radial current velocities from the measured data and transfer the results to a central server. If the calibr. data check box is marked, the script located at /home/wera/etc/process_CAL.
Quick Installation Guide 7.1.6 Calibration Power & TX off Calibration Power field can be used to reduce the direct path TX signal during 'Calibration' mode. When switching to Calibration (80 Hz offset), the receivers might be overdriven by the direct path signal, if the normal transmit power is kept. This mode enables to add attenuation to the transmitted signal during calibration cycles; it does not have any effect on normal cycles without frequency offset (RX Offset).
Quick Installation Guide The beam-forming software assumes, that the receive antennas are numbered from 1 to 16 as displayed. So a person standing in front of the receive antenna array with the seaside to the left, will be closest to receive antenna 1. The angle of true north is the angle covered by rotating clockwise from geographical north to the line of the receive antenna array.
Quick Installation Guide The first measurement will start to the next minute defined by this timing. It will not wait until minute 59. In CPCI crontab mode the measurement will be prepared at the defined time, but acquisition/transmission will start the next minute. The resulting data file will have a time encoding of the real acquisition start, so one minute later than defined in this field. 7.1.
Quick Installation Guide 7.1.14 Bandwidth Reduction This parameter is used in continuous mode only, when pre-scan and frequency adapt is activated. This value needs to be smaller or equal to the bandwidth determined by the range cell depth parameter.
Quick Installation Guide 7.1.18 Chirp Length The chirp length value defines the duration in seconds of each linear frequency sweep. The Chirp Length field has got the choice as listed in the pull-down menu. We recommend to use one of the chirp rates listed below: Chirp length Doppler spectra width Optimum operating frequency 0.216667 ±2.308 Hz 43.2 MHz Best for 60 Hz line freq 0.260000 ±1.923 Hz 30.0 MHz Best for 50 Hz line freq 0.433333 ±1.154 Hz 10.8 MHz Best for 60 Hz line freq 0.
Quick Installation Guide 7.1.20 Cycle Repetition Time The Cycle Repetition Time field is used for continuous measurements. It is a repetition time in minutes. Examples: - 01 - Repeat a measurement cycle every 1 minutes - nn - Repeat a measurement cycle every nn minutes - 60 - Repeat a measurement cycle every 60 minutes Remarks The Cycle Repetition Time must be larger than the Data Acquisition Time. Only for permanent mode a shorter time may be entered.
Quick Installation Guide 7.1.23 Data Acquisition Time The value of this field is calculated by multiplying the Samples per Data Run with the Chirp Length. Can’t be modified. 7.1.24 RX Offset This is an optional frequency offset between TX- and LO-signal. It is normally only used for calibration measurements to enable the test signal to pass the receivers high pass filters. By default an offset of 80 Hz should be used for all calibration measurements.
Quick Installation Guide 7.1.28 Clock In this field the software displays the currently configured master clock frequency. For systems with an older clock module the value should be set to 90.7 MHz. All new systems operate at 90.0 MHz. This parameter is defined by the file /home/wera/etc/WERA_Clock.asc. If a newer 90 MHz master clock is used, this file must be existent and contain the string 180.000000 in the first line. If a newer 90.
Quick Installation Guide For a description of most of the parameters see the description of WeraDesk in the previous chapter. The plot in the frequency management section displays an average of the external noise measured during the last frequency pre-scan. The last line shows the status of the measurement cycle on the left side and the status of automatic cycles (by crontab) on the right side. "Close This Window" closes the status page, which can be re-opened from the WeraDesk main page.
Quick Installation Guide With a click on the desired directory the contained status overview web page will be opened. Each status overview displays some information about the last measurement, followed by plots of radial sea surface current, radial sea surface current power level, radial current noise level, radial current signal to noise level and a plot of external frequency usage over time from the last frequency scan.
Quick Installation Guide These status overviews are generated by the script /home/wera/etc/process_SORT.sh if automatic post-processing of sea-echos is selected under WeraDesk. In the script status overview creation times (hour and minute) should be configured. Normally a status overview every few hours is sufficient. 7.
Quick Installation Guide The light grey lines in the background show the reference DPT data. In this example it can be seen that the RMS voltages have all dropped compared to the reference (from a real measurement after initial installation), but they are linearly increasing, which looks good. The phases look very good, too. Note that only phase values between +/-180 degrees are measured. That is why the phases of channel 11 and 12 in the following plot seem to be shifted.
Quick Installation Guide By default a link to this web page is available on the start web page: Since WeraDesk 3.0.6HZM a DPT measurement can be configured by just selecting the “DPT” check box when submitting settings for continuous cycles. For manual installation instructions see chapters 6.7 Create direct path test setup and 6.8 Set up your individual wera crontab. 7.
Quick Installation Guide It is possible to graphically predict the best time to replace a data disk or just to monitor if data files are generated continuously. For this purpose the script /home/wera/etc/Harddisk_Usage.sh has been programmed. This script will determine the hard disk usage of all defined hard disks or partitions and store the values in a file, including a time stamp. Then a plot over the last months is generated for each device, and a web page created.
Quick Installation Guide This software tool got a graphical user interface, giving the operator a fast and easy overview of hardware status, system performance and service/maintenance information. The software can either be operated sitting in front of the WERA system on-site, or remotely by logging in to the graphical user interface via internet remote access. Software like NX NoMachine, TeamViewer, OpenVPN or similar may be used for this purpose.
Quick Installation Guide If the values are within the valid range, the colour of the displayed values turns green. If not , the colour is changed to red. The temperatures might also be displayed in yellow colour, if the temperature is just below the limit or if the racks are still switched off to cool down. In addition you can see the maximum temperature, that is allowed inside the racks (FCR and RER).
Quick Installation Guide temperature in one of the racks exceeds the user defined limit, the system will automatically be switched off as a self protection mechanism against overheating. The system will be switched back on the next system check cycle, if the temperature has dropped at least 5°C below the limit again. So please choose your temperature limit depending on the external conditions. You can choose between 40 and 50 degrees celsius in five degree steps.
Quick Installation Guide Figure: 2 setup window – System tab If you finished configuring the software, click on “save” to save your settings or on “save and close” to close the setup window. If you want to discard your changes, then click on “close setup”. 7.10.1.3 WERA Setup-Window – PA (Power Amplifier) tab This section of the setup window can optionally be used to control a newer version rack mounted power amplifier and check its status.
Quick Installation Guide If the “Check PA voltages, power and temperature” check box is selected, these parameters will automatically be read out together with the automatic system check. The “PA gain control” can be used to manually change the overall gain of the power amplifier by selecting the desired radio button and then pushing the “Submit” button. This option may only be used while the system is stopped, or the PA is set into standby mode.
Quick Installation Guide When this option is activated, the software will automatically switch off the selected WERA racks in between the measurements in continuous acquisition measurement mode. This may be useful for installation in remote places, which are running from off-grid by renewable energy or generators. With the check boxes the user may select which AC outputs of the PSR should be switched off.
Quick Installation Guide This option may be useful if you got an unstable router or modem for the network connection, which needs to be reset automatically to dial into the internet again. Please activate the checkbox at the top, if you want to use this option, and make sure the correct port is defined. This modem test will be executed together with the automatic system test. To manually test the internet connection, please click on the corresponding “TEST” button.
Quick Installation Guide Figure: 6 setup window – Warnings tab If the “activate warning system” check box is selected, the software will generate warnings and status messages. These messages will be saved in the displayed directory with the shown file ending. By default this is /home/wera/SystemMonitor/outbox/. If you want to use a different directory or file ending, you may manually edit the configuration file setup.txt.
Quick Installation Guide 7.10.1.7 WERA Setup-Window – Email tab The Email section of the setup window is not activated. In the future this section could be used to configure warning emails, which may automatically be send out if an error has been detected. If you need this feature, please contact the Helzel team Note that this feature is now being replaced by the warning system. If you finished configuring the software, click on “save” to save your settings or on “save and close” to close the setup window.
Quick Installation Guide If you finished configuring the software, click on “save” to save your settings or on “save and close” to close the setup window. If you want to discard your changes, then click on “close setup”. Since version 3.0.2 of the software, the manual can directly be opened over a link in the main menu. 7.11 WERA Advanced Settings WERA Advanced settings is an web-based editor for settings of the WERA system which are hidden in /home/wera/etc and changed seldom.
Quick Installation Guide 11. Visualization In a standard application the visualization takes place on the WERA Server. For this reason please refer to the WERA Server Manual for all visualization and data management options. All WERA data processing programs are command – line tools. So a base knowledge of UNIX/Linux shell use is very advantageously. Please refer to the WERA user manual for details.
Quick Installation Guide 12. Pos 11 Installation Checklist Name of Site Co-ordinates of Rx 1 LON: LAT: of last Rx LON: LAT: Distance between poles 13 Type of array: Tx center position LON: LAT: Container position LON: LAT: Height of antenna foot Rxmin Rxmax Txmin Txmax Radial type 14 (a) Calibration, Internal /home/wera/etc/calibration.wera_internal___________ (b) Cable calibration /home/wera/etc/calibration.wera_cable_____________ (c) Optional Ant. Cal.
