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LBA
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Config Files
-cross indicates create cross-products -evlbi indicates data will be streamed using vsib_send and vsib_recv creates <blah>.input edit the input file and check the following: EXECUTE TIME (SEC): 50400 START MJD: 54058 START SECONDS: 82800 Times in seconds are from the start of the day. Need to change these if correlating a subset of the experiment Configurations NUM CONFIGURATIONS: 1 leave CONFIG SOURCE: DEFAULT leave INT TIME (SEC): 2 change if you want to NUM CHANNELS: 128 cahnge BLOCKS PER SEND: 1250 change in extreme cases (e.g. lots of spectral pts) for performance GUARD BLOCKS: 1 leave don’t know what this is POST-F FRINGE ROT: FALSE TRUE is faster but avoid when high spec res, high fringe rate QUAD DELAY INTERP: TRUE leave WRITE AUTOCORRS: TRUE change (if you want to) PULSAR BINNING: FALSE leave (unless you’re interested in pulsars) DATASTREAM 0 INDEX: 0 leave DATASTREAM 1 INDEX: 1 leave BASELINE 0 INDEX: 0 leave # FREQ TABLE #######! leave but check it agrees with obs # TELESCOPE TABLE ##! Change. Use GPS-Maser as first guess. Correlate on a fringe-finder, fringe fit and apply in production run. If monitoring GPS-Maser during the experiment use the rate from that, it’s probably better. TELESCOPE ENTRIES: 2 TELESCOPE NAME 0: HOB CLOCK DELAY (us) 0: −10.6 CLOCK RATE(us/s) 0: 0.0 TELESCOPE NAME 1: CED CLOCK DELAY (us) 1: 1.05 CLOCK RATE(us/s) 1: 0.0 # DATASTREAM TABLE #! leave, except maybe Tsys (in Jy) DATASTREAM ENTRIES: 2 DATA BUFFER FACTOR: 256 NUM DATA SEGMENTS: 16 TELESCOPE INDEX: 0 TSYS: 1240 DATA FORMAT: LBAVSOP QUANTISATION BITS: 2 FILTERBANK USED: FALSE READ FROM FILE: TRUE NUM FREQS: 1 FREQ TABLE INDEX 0: 0 CLK OFFSET 0 (us): 0.000 leave but this is the clock offset per freq. may be used after fringe-fit to correct for differing delays. NUM POLS 0: 2 INPUT BAND 0 POL: R check this is correct. INPUT BAND 0 INDEX: 0 INPUT BAND 1 POL: L INPUT BAND 1 INDEX: 0 # BASELINE TABLE ###! defines what to process BASELINE ENTRIES: 1 D/STREAM A INDEX 0: 0 D/STREAM B INDEX 0: 1 baseline 0 correlates antennas 0 and 1 NUM FREQS 0: 1 POL PRODUCTS 0/0: 2 D/STREAM A BAND 0: 0 A0-B0 (RCP) D/STREAM B BAND 0: 0 D/STREAM A BAND 1: 1 A1-B1 (LCP) D/STREAM B BAND 1: 1 For cross-products too vex2config.pl -cross chsb6324.skd and the above section will look like this: POL PRODUCTS 0/0: 4 D/STREAM A BAND 0: 0 D/STREAM B BAND 0: 0 D/STREAM A BAND 1: 1 D/STREAM B BAND 1: 1 D/STREAM A BAND 2: 0 D/STREAM B BAND 2: 1 D/STREAM A BAND 3: 1 D/STREAM B BAND 3: 0 # DATA TABLE ####### Need to edit this bit if not using evlbi (vsib_send/recv) mode: should be the number of raw data files in each directory e.g.: # DATA TABLE ####### D/STREAM 0 FILES: 6 FILE 0/0: /data/sb6324/ho/sb6324_Ho_323_230000.lba FILE 0/0: /data/sb6324/ho/sb6324_Ho_323_230010.lba FILE 0/0: /data/sb6324/ho/sb6324_Ho_323_230020.lba FILE 0/0: /data/sb6324/ho/sb6324_Ho_323_230030.lba FILE 0/0: /data/sb6324/ho/sb6324_Ho_323_230040.lba FILE 0/0: /data/sb6324/ho/sb6324_Ho_323_230050.lba D/STREAM 1 FILES: 6 FILE 0/0: /data/sb6324/cd/sb6324_Cd_323_230000.lba FILE 0/0: /data/sb6324/cd/sb6324_Cd_323_230010.lba FILE 0/0: /data/sb6324/cd/sb6324_Cd_323_230020.lba FILE 0/0: /data/sb6324/cd/sb6324_Cd_323_230030.lba FILE 0/0: /data/sb6324/cd/sb6324_Cd_323_230040.lba FILE 0/0: /data/sb6324/cd/sb6324_Cd_323_230050.lba # NETWORK TABLE ####! for eVLBI. PORT NUM 0: 52100 port number for data stream 1 TCP WINDOW (KB) 0: 512 TCP window size PORT NUM 1: 52101 port number for data stream 2 TCP WINDOW (KB) 1: −1 cd to directory with VEX file vex2model_updated.pl chsb6324.skd machines file first line is head node (hex0) next is data stream processes: hex0 hex0 head node hex0 data stream 0 hex0 data stream 1 (if e.g. data were on hex4): hex4 data stream 0 hex4 data stream 1 next are processing (core) nodes hex1 hex2 hex3 hex4 hex5 (leaving hex0 to deal with IO (data streams) and head (manager)). We could specify hex0 as another core node and use the remaining 5 threads (1+4) but in this case there’s no need) edit the threads file. Note number of spaces between text is important: NUMBER OF CORES: 5 8 8 8 8 8 These would be reduced if running IO nodes on other machines. E.g. if data on hex4: 8 8 8 6 8 … and may have used hex0 too, but anyway…. edit run.sh -np 8 (where 8 is # processes, = wc -l machines) VEX2config evlbi mode to use vsib_send and recv instead of specifying files by hand. Also, selecting three antennas only: vex2config.pl -evlbi -ant Pa -ant At -ant Mp vt12a.skd Example
EXECUTE TIME: 1200 INT TIME (SEC): 0.5 FREQ (MHZ) 0: 6640.00 remove the semi-colon from end of READ FROM FILE If pols swapped at Ceduna, for CED: INPUT BAND 0 POL: L INPUT BAND 1 POL: R
hex0 hex2 hex5 hex1 hex2 hex3 hex4 hex5
NUMBER OF CORES: 5 8 7 8 8 7 |