Session notes for V16019 A. Niell 2016/01/16 Session description: This VLBI session involves GGAO12M and Westford using a geodetic configuration and schedule. The objective is to exercise the procedures for a VGOS session from planning through analysis. Session notes: -------------- Date: 2016 Jan 19 (DOY 019) Start time: 1500 UTC (1000 EST) or as agreed to by stations Stations: GGAO12M Westford Duration: 1 hour Correlation: Haystack e-transfer test scan?: yes Modules: Data volume: less than 2 TB Record on one module per station. Ship one spare to each station. Ship GGAO module to Haystack Schedule: v16019.skd Created by AEN, achieved 42 scans/hour. Time: 160119 00UT through 160119235959 (Tuesday) SLR mask at GGAO: ON Summary: SKED Summary from file ./v16019.skd for experiment V1601 Key: Wf=WESTFORD Gs=GGAO12M Wf Gs Avg % obs. time: 37 37 37 % cal. time: 2 2 2 % slew time: 55 36 46 % idle time: 4 23 14 total # scans: 1006 1006 1006 # scans/hour : 42 42 42 Avg scan (sec): 32 32 32 # data tracks: 16 16 # Mk5 tracks: 16 16 Total TB(M5): 33.0 33.0 33.0 # OF OBSERVATIONS BY BASELINE | Wf Gs Total -------------------- Number of 2-station scans: 1006 Total number of scans: 1006 Total number of obs: 1006 Total integrated obs-time: 32245 Average obs-time: 32.1 Histogram of observation durations Dur: 30 35 40 45 50 55 60 #Obs: | 883| 39| 36| 26| 14| 8| Average X-band SNRs by baseline | Wf Gs AVG ------------------- Wf| 42 42 Gs| 42 Average S-band SNRs by baseline | Wf Gs AVG ------------------- Wf| 30 30 Gs| 30 BAND AND CHANNEL FREQUENCIES: ----------------------------- Second Nyquist zone diff mod(32) relative to lowest lower edge f_LO f_sample lower edge ch 15 DC freq high- or low-band Band UDC 4* UDC -22500 1024 -496 +32 pcal offset GGAO Westford A 6243.1 24972.4 2472.4 3496.4 3000.4 3032.4 0 1.4 low low B 6803.1 * 27212.4 4712.4 5736.4 5240.4 5272.4 70 1.4 high high C 7083.1 28332.4 5832.4 6856.4 6360.4 6392.4 105 1.4 high high D 8043.1 32172.4 9672.4 10696.4 10200.4 10232.4 225 1.4 high high *The UDC frequency that was used for earlier sessions, 6787.1, has been replaced with 6803.1 in order to have the pcal offset be the same in all bands. Frequency that goes to DC The 32MHz channels are lower sideband. polarization** IF channel* A B C D polarization** 0 1 3480.4 5720.4 6840.4 10680.4 H(X) 0 2 3448.4 5688.4 6808.4 10648.4 H(X) 0 4 3384.4 5624.4 6744.4 10584.4 H(X) 0 6 3320.4 5560.4 6680.4 10520.4 H(X) 0 9 3224.4 5464.4 6584.4 10424.4 H(X) 0 13 3096.4 5336.4 6456.4 10296.4 H(X) 0 14 3064.4 5304.4 6424.4 10264.4 H(X) 0 15 3032.4 5272.4 6392.4 10232.4 H(X) 1 1 3480.4 5720.4 6840.4 10680.4 V(Y) 1 2 3448.4 5688.4 6808.4 10648.4 V(Y) 1 4 3384.4 5624.4 6744.4 10584.4 V(Y) 1 6 3320.4 5560.4 6680.4 10520.4 V(Y) 1 9 3224.4 5464.4 6584.4 10424.4 V(Y) 1 13 3096.4 5336.4 6456.4 10296.4 V(Y) 1 14 3064.4 5304.4 6424.4 10264.4 V(Y) 1 15 3032.4 5272.4 6392.4 10232.4 V(Y) *PFB channels are numbered 0-15; ch 0 spans +16MHz to -16MHz about f_sample ** H/V are physical; X/Y are fourfit label