WeraDesk [Web Interface] Documentation - WERA_scan

• The source code is in ~/Fortran/WERA_scan.F
• Compilation with ~/Fortran/do_X11R6_wera_scan.sh generates the executable ~/Fortran/WERA_scan
• ~/Fortran/WERA_scan is called by ~/etc/Process_SCAN.sh .

WERA_scan is used to calculate the optimum working frequency from a frequency scan. The inplemented functions are as follows:

• Read the scan data file yyyydddhhmm_cod.RAW. The data format is identical to the standard .RAW measurements, except some special entries in the header.
• Calculate the average power vs. frequency from all antennas and scans.
• To increase the weigth of the strong radio sources within the scan, power**ALPHA is calculated with ALPHA = 2.0 (ALPHA can be considered as a contrast factor).
• The radar operating frequency with the lowest average SUM(power**ALPHA) for the given bandwidth is calculated.
• If the average SUM(power**ALPHA) of the next lower bandwith is by a factor of GAMMA = 1.5 lower than the calculated average SUM(power**ALPHA) of the actual bandwidth, the next lower bandwith is selected. This step is repeated 2 times (GAMMA is a value to express preference to the higher bandwidth). The lowest possible bandwidth is 50 kHz.
• The extended header /home/wera/weractrl/ctrl_data.cpy is modified to reflect the new radar center frequency and bandwidth (to be used for the next measurement cycle).
• An image of the frequency scan and the selected radar center frequency and bandwidth is written to /home/wera/public_html/WERA_scan.gif
  

Compilation from source:

VMS: Source is in WERA_scan.F Compilation and linking with @WERA_scan Program needs to be defined as an external command to take parameters from the command line, e.g. $ WERA_scan :== $$USER1:[GURGEL.HAWAII.Sources]WERA_scan.exe