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Hops Developments
RO GER CAPPAL L O HAYSTACK DIFX M EETING 201 1 .1 2.6


Recent features in fourfit
Multitone pcal Ў time segmentation pc_period


Tracking phase jumps via pcal

Tint = full scan

Tint = 10 s


Recent features in fourfit
Multitone pcal Ў time segmentation pc_period Ў masking of contaminated tones pc_tonemask A priori ionosphere removal Ў Values specified per-station in TEC units ionosphere


No Ionosphere
Mk4/hdw. fourfit 3.5 3C273B.uqnazk, 287-1700A, EG
WESTFORD - GGAO, fgroup X, pol LL
Fringe quality 4 Error code G 296.6 SNR Intg.time 568.723 3.488 Amp 178.8 Phase 0.0e+00 PFD Delays (us) SBD 0.053236 MBD 0.006760 Fr. rate (Hz) 0.001890 Ref freq (MHz) 3368.4000 AP (sec) 1.000 X8_tst Exp. 3307 Exper # Yr:day 2009:287 Start 170001.00 Stop 170930.00 FRT 170445.00 Correlation date 2009:297:164107 fourfit exec/bld: 2011:301:183803 2011:299:150920 RA & Dec (J2000) 12h29m 6.6997s +2°03' 8.598"

Amp. and Phase vs. time for each freq., 7 segs, 94 APs / seg (94.00 sec / seg.), time ticks 60 sec

Validity Bias

U L U L U EG

Level

EG


Mk4/hdw. fourfit 3.5

With differential ionosphere of 5.13 TEC units

3C273B.uqnazk, 287-1700A, EG
WESTFORD - GGAO, fgroup X, pol LL
Fringe quality 6 Error code G 386.5 SNR Intg.time 568.723 4.536 Amp 130.7 Phase 0.0e+00 PFD Delays (us) SBD 0.053886 MBD 0.006964 Fr. rate (Hz) 0.001868 Ref freq (MHz) 3368.4000 AP (sec) 1.000 X8_tst Exp. 3307 Exper # Yr:day 2009:287 Start 170001.00 Stop 170930.00 FRT 170445.00 Correlation date 2009:297:164107 fourfit exec/bld: 2011:301:183933 2011:299:150920 RA & Dec (J2000) 12h29m 6.6997s +2°03' 8.598"

Amp. and Phase vs. time for each freq., 7 segs, 94 APs / seg (94.00 sec / seg.), time ticks 60 sec

Validity Bias

U L U L U EG

Level

EG


Recent features in fourfit
Multitone pcal Ў time segmentation pc_period Ў masking of contaminated tones pc_tonemask A priori ionosphere removal Ў Values specified per-station in TEC units ionosphere Sampler-based delay correction to phases


Mk4/hdw. fourfit

Uncorrected sampler 3.5delay

3C279.voikot, 094-0839_JOIN, SD
SMTOL - CARMAR, fgroup U, pol LL
Fringe quality 7 73.9 SNR Intg.time 177.817 1.619 Amp -0.2 Phase 0.0e+00 PFD Delays (us) SBD 0.006603 MBD 0.000049 Fr. rate (Hz) 0.045417 Ref freq (MHz) 229345.0000 AP (sec) 1.000 mm093 Exp. 3365 Exper # Yr:day 2011:094 Start 083902.00 Stop 084200.00 FRT 084030.00 Correlation date 2011:107:232052 fourfit exec/bld: 2011:301:190442 2011:299:150920 RA & Dec (J2000) 12h56m11.1665s -5°47'21.524"

Amp. and Phase vs. time for each freq., 7 segs, 29 APs / seg (29.00 sec / seg.), time ticks 60 sec

Validity Bias

U L U L U SD

Level

L

SD


With sampler delay offset
Mk4/hdw. fourfit 3.5 3C279.voikot, 094-0839_JOIN, SD
SMTOL - CARMAR, fgroup U, pol LL
Fringe quality 7 77.4 SNR Intg.time 177.817 1.683 Amp 0.0 Phase 0.0e+00 PFD Delays (us) SBD 0.000199 MBD 0.000051 Fr. rate (Hz) 0.045422 Ref freq (MHz) 229345.0000 AP (sec) 1.000 mm093 Exp. 3365 Exper # Yr:day 2011:094 Start 083902.00 Stop 084200.00 FRT 084030.00 Correlation date 2011:107:232052 fourfit exec/bld: 2011:301:191646 2011:299:150920 RA & Dec (J2000) 12h56m11.1665s -5°47'21.524"

Amp. and Phase vs. time for each freq., 7 segs, 29 APs / seg (29.00 sec / seg.), time ticks 60 sec

Validity Bias

U L U L U SD

Level

L

SD


Future features in fourfit
Combination of full Stokes polarization products
Ў Ў

e.g. {VxV, HxH, VxH, HxV} or {RxV, RxH, LxV, LxH} Initially: I (HxH+VxV) cos + (HxV-VxH) sin (need to return az and el from calcif2 in order to calculate parallactic angle ) General combinations: Use parallactic angle and user-specified phase and/or instrumental cal. phase

Ў

Automated ionosphere estimation and removal Ad hoc file-based phase correction, (t) Higher order instrumental phase correction within each

channel (necessary for wider channels)


Phase variation across a single channel


Mk4/hdw. fourfit 3.5

3C273B.uqnazk, 287-1700A, EG
WESTFORD - GGAO, fgroup X, pol LL
Fringe quality 6 Error code G 386.5 SNR Intg.time 568.723 4.536 Amp 130.7 Phase 0.0e+00 PFD Delays (us) SBD 0.053886 MBD 0.006964 Fr. rate (Hz) 0.001868 Ref freq (MHz) 3368.4000 AP (sec) 1.000

Future features in fourfit (cont'd)
.

Go from 3D search on (sb, mb , ) to 2D (mb , )

.

over the full frequency range

Amplitude weighting for fine fit
Amp. and Phase vs. time for each freq., 7 segs, 94 APs / seg (94.00 sec / seg.), time ticks 60 sec

X8_tst Exp. 3307 Exper # Yr:day 2009:287 Start 170001.00 Stop 170930.00 FRT 170445.00 Correlation date 2009:297:164107 fourfit exec/bld: 2011:301:183933 2011:299:150920 RA & Dec (J2000) 12h29m 6.6997s +2°03' 8.598"

Validity Bias

U L U L U EG

Level

L

EG

EG

3368.40 3432.40 3496.40 3560.40 3624.40 3688.40 3752.40 3816.40 5416.40 5480.40 5544.40 5608.40 5672.40 5736.40 5800.40 5864.40 7464.40 7528.40 7592.40 7656.40 7720.40 7784.40 7848.40 7912.40 7976.40 8040.40 8104.40 8168.40 8232.40 8296.40 8360.40 8424.40 Freq (MHz) 130.0 133.7 134.4 131.5 122.5 118.3 116.4 121.0 151.8 153.3 152.6 143.1 141.0 134.7 124.5 120.2 132.8 113.5 121.4 134.5 126.2 126.1 129.9 121.5 118.4 120.2 123.9 118.3 121.4 122.7 135.0 134.0 Phase

All 130.7