CARMA Baseline Solutions


Applying Baseline


Baseline Solutions

configuration solution period (PST) status note
C antpos.090414 Apr. 14, 2009 -- ... C-config solution refant=C8. Vernesa used an iterative process: "First the slope-500MHz method reaches a ~6cm accuracy. Then taking the upper/lower sidebands separately yields a ~0.5 cm accuracy. Finally applying these solutions to the initial data set resulted in the attached positions." Here are phase vs. time plots before and after the solutions have been applied. "The formal uncertainties on the (x,y,z) positions are better than 0.1mm. However, the phase scatter of the fit is larger than in optimal conditions [mean~0.4 radian (usually 0.2-0.3), reaching up to >0.6rad for C1, C2, C4], so another track would be useful."
D antpos.090331 Mar. 31, 2009 -- Apr. 9, 2009 D-config solution C8 used as refant. C1,2,4,5,6 moved in y more than 0.4mm (see comparison with previous solutions here) Phase vs. time after baseline correction is applied can be found in PhaseTime.BS.090331.pdf
D antpos.090225 Feb. 25, 2009 -- Mar. 31, 2009 D-config solution Good solution for C3. Phase vs. time after baseline correction is applied can be found in (PhaseTime.BS.090225.pdf)
D antpos.090221 Feb. 21, 2009 -- Feb. 25, 2009 First D-config solution C3 still on A-config pad. Solution derived by Dick Plambeck.
A antpos.090131 Jan. 31, 2009 -- ... Improved A-array solutions C2 used as refant. Accuracy within ~1mm, compared to antpos.090127 (compare.090131.pdf). Phase vs. time after baseline correction is shown in (PhaseTime.BS.090131.pdf).
A antpos.090127 Jan. 05, 2009 -- Jan. 31, 2009 First PROPER A-array solution Solutions consistent with those below for C1-9, 11, 12, 14, 15. Significant improvement for C10 & C13.
A antpos.090119 see above First A-array solution C2 used as reference antenna. Solutions good to ~1mm, or better. C10/10 tricky. Phase rms scatter can be seen here (refant excluded). Phase vs. time after baseline corrections have been applied can be found here (13MB). For reference, a phase. vs. time plot before baseline solution correction were applied can be found here (13MB).
B antpos.081221 Dec. 21 2008 -- Jan. 04 2009 Second B-array solution C13 used as reference antenna. C5 has moved >0.4mm. Changes compared to antpos.081121 can be seen here
B antpos.081122 Nov. 21 2008 -- Dec. 21, 2008 Initial B-array solution C13 (only antenna that has not been moved) used as reference antenna.
C antpos.081024 Oct. 24 2008 -- Nov. 21 2008 Second C-array solution C8 used as reference antenna. First solution for C4; some antennas have moved >0.4mm. Changes compared to antpos.081012 can be seen here
C antpos.081012 Oct. 11 2008 -- Oct. 24 2008 First C-array solution (based on 2 baseline tracks) C1, C4 out; C8 used as reference antenna. New solutions will be derived in ~2 weeks.
E antpos.081008 Oct. 08 2008 -- end of E-array Second E-array solution All antennas present; C10 used as reference antenna. These solutions confirm the previous E-array solutions; no major changes. The x,y,z position changes, compared to previous solutions (antpos.080912), can be seen here
E antpos.080912 Sep. 12 2008 -- Oct. 08 2008 Use for E-array tracks; > Sep/12/2008
D antpos.080827 Aug. 27 2008 -- Sep. 12 2008 No major (>0.4mm) changes compared to Jul. 23 solutions. Use for tracks run after Aug/26/2008 C3 was out of the array, C13 did not lock, refant=C11. Maximum position change (compared to antpos.080723) is 0.3 mm (C12), median position change of all antennas is ~0.03 mm with a 1 sigma spread of 0.1 mm.
D antpos.080723 Jul. 23 2008 -- Aug. 26 2008 No major changes compared to Jun. 06 solutions. Use for tracks run after July/22/2008
D antpos.080606 Jun. 06, 2008 -- Jul. 22 2008 Final for the move to D-array; use for tracks run after June/05/2008
C antpos.080518 May. 18 -- Jun. 05, 2008 Final
C antpos.080414 Apr. 14 -- May. 17, 2008 Final
D antpos.080313 Mar. 9 -- Apr. 13, 2008 C1 moved a bit.
D antpos.080228 Feb. 22, 2008- Mar. 8, 2008 Final Good solution after move
B antpos.080218 Feb. 1, 2008-Feb. 17, 2008 Final
B antpos.080115 Jan. 5, 2008-Feb. 1, 2008 Final Pads moved after snow (Jan.4-5).
B antpos.071121 Nov. 15, 2007- Jan. 5, 2008 Final
C antpos.071109 Oct. 26, 2007-Nov. 12, 2007 Final Good solution with error ~0.2mm.
C antpos.071014 Oct. 07, 2007-Oct. 25, 2007 Final Small changes from previous solution. C1&6 have largest errors.
C antpos.070916 Sep. 08, 2007-Oct. 07, 2007 Final Solution after move
E antpos.070908 Aug. 25, 2007-Sep. 11, 2007 Final C5,10,12,13,14,15 moved by 0.2-0.3mm from previous sol.
E antpos.070808 Aug. 9, 2007-Aug. 24, 2007 Final Good solution after move
D antpos.070625 Jun. 25, 2007-Aug. 9, 2007 Final
D antpos.070613 Jun. 13 (noon), 2007-Jun. 25, 2007 Final C8 moved slightly (~0.3mm)
D antpos.070509 Apr. 30 (noon), 2007-Jun. 13 (noon), 2007 Final
D antpos.070411 Apr. 9 (noon), 2007-Apr. 30 (noon), 2007 Final C4,11 moved
C->D antpos.070406 Apr. 6-9 (noon), 2007 Final C1,2,5,15 moved
C->D antpos.070405 Apr. 5-6 (noon), 2007 Final C7,8,13,14 moved
C antpos.070322 Mar. 5- Apr. 5, 2007 Final Good solution
C antpos.070220 Feb. 15, 2007 - Mar. 5, 2007 Final antpos.070115 is still ok, but C11 shifted slightly
C antpos.070115 Jan. 9, 2007 - Feb. 15, 2007 Final C2, 4, 5 moved
ENG->C antpos.070108 Jan. 8-9, 2007 Final C14 moved
ENG->C antpos.070105 Jan. 5-8, 2007 Final C15 moved
ENG->C antpos.070104
axoff.comb.060914.minus
axoff.comb.070101
Jan. 4-5, 2007 Final C8, 11 moved
Apply both axoff.comb.060914.minus and axoff.comb.070101
ENG->C antpos.070103
axoff.comb.060914.minus
axoff.comb.070101
Jan. 3-4, 2007 Final C7 moved
Apply both axoff.comb.060914.minus and axoff.comb.070101
ENG antpos.061220
axoff.comb.060914.minus
axoff.comb.070101
Dec. 20, 2006 - Jan. 3, 2007 Final C1 moved
Remove C5 for Dec. 12-25
Apply both axoff.comb.060914.minus and axoff.comb.070101
ENG antpos.061012
axoff.comb.060914.minus
axoff.comb.070101
Nov. 11, 2006 - Dec. 20, 2006 Final Remove C5 for Dec. 12-25
Apply both axoff.comb.060914.minus and axoff.comb.070101
ENG antpos.061012
axoff.comb.070101
- Nov. 10, 2006 Final

Jin Koda "koda @ astro.caltech.edu"