Table of contents
Introduction
Normally Pico Veleta data is recorded for GMVA as PV (DBBC2) data in 8 band x 64 MHz per polarization setup. However, during the October 2019 (C192) GMVA session this data was recorded with wrong polarization setup for most of the session (during C192A, C192B and the first quarter of C192C parts both polarization channels recorded RCP and LCP was completely lost), due to an undetermined technical problem. Luckily Pico Veleta was also recording data with the other backend for testing purposes, DBBC3 in 16 band x 32 Mhz per polarization setup. To avoid the loss of the data the main production correlation was performed using this P3 data (for C192A and C192C also a correlation with PV was done to be used at PIs discretion).
Unfortunately, because DBBC3 is still in the comissioning stage, phase instability and small amplitude insonsistencies for different boards were found due to harware problems. To compensate for this, additional per band delay corrections were applied during the correlation, which are described below.
.vex and .v2d channel setup of P3
The frequency setup for P3 in the $FREQ section of ,vex files was done as follows:
def 86044.00MHz32x32MHz;
* mode = 1 stations =P3
sample_rate = 64.000 Ms/sec; * (2bits/sample)
chan_def = : 86044.00 MHz : U : 32.00 MHz : &CH01 : &BBC01 : &NoCal; *Lcp
chan_def = : 86044.00 MHz : L : 32.00 MHz : &CH02 : &BBC01 : &NoCal; *Lcp
chan_def = : 86108.00 MHz : U : 32.00 MHz : &CH03 : &BBC02 : &NoCal; *Lcp
chan_def = : 86108.00 MHz : L : 32.00 MHz : &CH04 : &BBC02 : &NoCal; *Lcp
chan_def = : 86172.00 MHz : U : 32.00 MHz : &CH05 : &BBC03 : &NoCal; *Lcp
chan_def = : 86172.00 MHz : L : 32.00 MHz : &CH06 : &BBC03 : &NoCal; *Lcp
chan_def = : 86236.00 MHz : U : 32.00 MHz : &CH07 : &BBC04 : &NoCal; *Lcp
chan_def = : 86236.00 MHz : L : 32.00 MHz : &CH08 : &BBC04 : &NoCal; *Lcp
chan_def = : 86300.00 MHz : U : 32.00 MHz : &CH09 : &BBC05 : &NoCal; *Lcp
chan_def = : 86300.00 MHz : L : 32.00 MHz : &CH10 : &BBC05 : &NoCal; *Lcp
chan_def = : 86364.00 MHz : U : 32.00 MHz : &CH11 : &BBC06 : &NoCal; *Lcp
chan_def = : 86364.00 MHz : L : 32.00 MHz : &CH12 : &BBC06 : &NoCal; *Lcp
chan_def = : 86428.00 MHz : U : 32.00 MHz : &CH13 : &BBC07 : &NoCal; *Lcp
chan_def = : 86428.00 MHz : L : 32.00 MHz : &CH14 : &BBC07 : &NoCal; *Lcp
chan_def = : 86492.00 MHz : U : 32.00 MHz : &CH15 : &BBC08 : &NoCal; *Lcp
chan_def = : 86492.00 MHz : L : 32.00 MHz : &CH16 : &BBC08 : &NoCal; *Lcp
chan_def = : 86044.00 MHz : U : 32.00 MHz : &CH17 : &BBC09 : &NoCal; *Rcp
chan_def = : 86044.00 MHz : L : 32.00 MHz : &CH18 : &BBC09 : &NoCal; *Rcp
chan_def = : 86108.00 MHz : U : 32.00 MHz : &CH19 : &BBC10 : &NoCal; *Rcp
chan_def = : 86108.00 MHz : L : 32.00 MHz : &CH20 : &BBC10 : &NoCal; *Rcp
chan_def = : 86172.00 MHz : U : 32.00 MHz : &CH21 : &BBC11 : &NoCal; *Rcp
chan_def = : 86172.00 MHz : L : 32.00 MHz : &CH22 : &BBC11 : &NoCal; *Rcp
chan_def = : 86236.00 MHz : U : 32.00 MHz : &CH23 : &BBC12 : &NoCal; *Rcp
chan_def = : 86236.00 MHz : L : 32.00 MHz : &CH24 : &BBC12 : &NoCal; *Rcp
chan_def = : 86300.00 MHz : U : 32.00 MHz : &CH25 : &BBC13 : &NoCal; *Rcp
chan_def = : 86300.00 MHz : L : 32.00 MHz : &CH26 : &BBC13 : &NoCal; *Rcp
chan_def = : 86364.00 MHz : U : 32.00 MHz : &CH27 : &BBC14 : &NoCal; *Rcp
chan_def = : 86364.00 MHz : L : 32.00 MHz : &CH28 : &BBC14 : &NoCal; *Rcp
chan_def = : 86428.00 MHz : U : 32.00 MHz : &CH29 : &BBC15 : &NoCal; *Rcp
chan_def = : 86428.00 MHz : L : 32.00 MHz : &CH30 : &BBC15 : &NoCal; *Rcp
chan_def = : 86492.00 MHz : U : 32.00 MHz : &CH31 : &BBC16 : &NoCal; *Rcp
chan_def = : 86492.00 MHz : L : 32.00 MHz : &CH32 : &BBC16 : &NoCal; *Rcp
enddef;
*
compared with the normal PV $FREQ setup:
def 86076.00MHz16x64MHz;
* mode = 1 stations =Pv
sample_rate = 128.000 Ms/sec; * (2bits/sample)
chan_def = : 86076.00 MHz : U : 64.00 MHz : &CH01 : &BBC01 : &NoCal; *Rcp *
chan_def = : 86204.00 MHz : U : 64.00 MHz : &CH02 : &BBC02 : &NoCal; *Rcp *
chan_def = : 86332.00 MHz : U : 64.00 MHz : &CH03 : &BBC03 : &NoCal; *Rcp *
chan_def = : 86460.00 MHz : U : 64.00 MHz : &CH04 : &BBC04 : &NoCal; *Rcp *
chan_def = : 86076.00 MHz : U : 64.00 MHz : &CH05 : &BBC05 : &NoCal; *Lcp
chan_def = : 86204.00 MHz : U : 64.00 MHz : &CH06 : &BBC06 : &NoCal; *Lcp
chan_def = : 86332.00 MHz : U : 64.00 MHz : &CH07 : &BBC07 : &NoCal; *Lcp
chan_def = : 86460.00 MHz : U : 64.00 MHz : &CH08 : &BBC08 : &NoCal; *Lcp
chan_def = : 86076.00 MHz : L : 64.00 MHz : &CH09 : &BBC01 : &NoCal; *Rcp *
chan_def = : 86204.00 MHz : L : 64.00 MHz : &CH10 : &BBC02 : &NoCal; *Rcp *
chan_def = : 86332.00 MHz : L : 64.00 MHz : &CH11 : &BBC03 : &NoCal; *Rcp *
chan_def = : 86460.00 MHz : L : 64.00 MHz : &CH12 : &BBC04 : &NoCal; *Rcp *
chan_def = : 86076.00 MHz : L : 64.00 MHz : &CH13 : &BBC05 : &NoCal; *Lcp
chan_def = : 86204.00 MHz : L : 64.00 MHz : &CH14 : &BBC06 : &NoCal; *Lcp
chan_def = : 86332.00 MHz : L : 64.00 MHz : &CH15 : &BBC07 : &NoCal; *Lcp
chan_def = : 86460.00 MHz : L : 64.00 MHz : &CH16 : &BBC08 : &NoCal; *Lcp
enddef;
Since LCP and RCP were recorded at two different Mk6 modules, two data streams were defined at the .v2d files:
ANTENNA P3 {
datastreams = P3L, P3R
zoom = 32mhz
}
DATASTREAM P3L {
filelist = filelist.P3.LCP
format=VDIF_8224-2048-16-2
}
DATASTREAM P3R {
filelist = filelist.P3.RCP2
format=VDIF_8224-2048-16-2
}
In addition, to correlate all stations in 16 x 32 MHz mode zoom bands were defined:
ZOOM 32mhz {
addZoomFreq = freq@86012/bw@32.0
addZoomFreq = freq@86044/bw@32.0
addZoomFreq = freq@86076/bw@32.0
addZoomFreq = freq@86108/bw@32.0
addZoomFreq = freq@86140/bw@32.0
addZoomFreq = freq@86172/bw@32.0
addZoomFreq = freq@86204/bw@32.0
addZoomFreq = freq@86236/bw@32.0
addZoomFreq = freq@86268/bw@32.0
addZoomFreq = freq@86300/bw@32.0
addZoomFreq = freq@86332/bw@32.0
addZoomFreq = freq@86364/bw@32.0
addZoomFreq = freq@86396/bw@32.0
addZoomFreq = freq@86428/bw@32.0
addZoomFreq = freq@86460/bw@32.0
addZoomFreq = freq@86492/bw@32.0
}
Determination and application of per band delay corrections
lkjlkjkj
Fringe solution with manually corrected phase differences (manual phase cal)
Plots
TBD
