# CARMA Baseline Solutions

## Applying Baseline

- Baseline correction:
  - Do a miriad cvs update to your source tree. This way, you will have the latest baseline solutions in $MIRCAT/baselines/carma/antpos.YYMMDD file.

                 cd $MIR ; cvs -nq update ; cvs update

- Alternately,
  - Find the date your data were taken, and download a baseline solution from the list below.
  - Apply the solution "antpos.YYMMDD" to the data "xxx.mir", and obtain the corrected data "yyy.mir".

                 uvedit vis=xxx.mir apfile=antpos.YYMMDD out=yyy.mir

  - It's safe to apply baseline correction if you don't know what solution has been applied to your data.
- Axis offset correction:
  - Early tracks (before Jan 5, 2007) need axis offset correction (don't forget @).

                 axcor vis=yyy.miriad axoff=@axoff.xxx out=zzz.miriad

## Baseline Solutions

configuration | solution | Baseline track taken on | status | Notes
--- | --- | --- | --- | ---
B | antpos.120102 | Jan 02, 2012 | CARMA15 (3mm) and SZA (1cm) track | Final B array baseline solutions.; this solution includes CARMA15 3mm solutions and SZA 1cm solutions concatenated from two separate tracks. Positions relative to C6 and C16 for sci1 and sci2 respectively. Significant change in solutions only for C17 and C19 from the previous ultra-short sci2 track.
B | antpos.111221 | Dec 21, 2011 | SZA (1cm) track | First baseline track for sci2. < 2 hours of data, therefore HA coverage is not great; should improve the present solution with a CARMA23 track; this solution includes first B array sci1 solutions for all moved antennas from Dec 15; positions fit relative to C23.
B | antpos.111215 | Dec 15, 2011 | Sci1 | First Sci1 baseline solution after move to B config.

A

antpos.111213

Dec 13, 2011

CARMA23 track

Final CARMA23 track after the SZA pad offsets for C19 and C20 were updated by Nikolaus. Still no fringes on C20 baselines (even for the paired antenna baseline C5-C20). C16 and C23 out of the array and only partial data for C17. Good solutions for all other antennas to be used for PACS correction relative to C8. C19 (whose pad offsets were updated prior to the track), and C22 (which had < 2 hrs of data in the previous track) have significant offsets. x, y, z offsets for C19 (in ns): -0.16, 0.14, -0.02. C22 offset is significant in x (0.01 ns).

A

antpos.111206

Dec 06, 2011

CARMA23 track

Excellent weather CARMA23 track after the new SZA pad offsets were put into the system (on Dec 02). No fringes on C16, C19, and C20 for all baselines. Good solutions for all other antennas to be used for PACS correction relative to C8. C1, C5, C11 and C15 have significant offsets from the previous value; curiously all 0.01 ns in the x-direction. The PACS SZA antennas C17, C18, C21, C2 and C23 had a roughly constant offset in x, y and z of -0.15,+0.14,-0.01 ns respectively. C22 had data for less than 2 hours, so solutions are based on few sources (but reasonable HA and Dec. coverage).
Steps:
1. Derive solutions for C1,C2,C5,C10 relative to C8 using bee 4-P fit
2. use this group to derive solutions individually for all other sci1 and sci2 antennas
3. sci2 antenna solutions derived using step2 followed several iterations of phase difference and 4-P.
4. using win(9) only in 4-P fit for sci2 antennas reduced the phase noise considerably.

A

antpos.111123

Nov 23, 2011

sci2 track

Solutions derived for C17. C20 used as reference antenna. The pad offsets were very large. The difference relative to the raw positions off by 1.2m, 12 cm, 0.8m in x, y and z respectively.
I did the following to derive this.

1. Choose a reasonably bright source with good HA coverage to fit the slopes across bands and solve for the xy position.
2. Choose a cluster of reasonably bright sources close to 0 dec, fit the slopes across bands and do a 4-parameter fit
3. Step 3 and Step 4. USB-LSB difference for all sources, followed by 4p. This involved several iterations, flagging, unwrapping etc in bee on all sources. Before and After these solutions were applied for C17 baselines.

A | antpos.111117 | Nov 17, 2011 | sci1 track | First complete A array solutions based on three succesive tracks from the first day of the move (15 Nov). C8 used as reference antenna. Summary: used phase slopes across wide bands, phase differences between LSB and USB and finally 4-P bit in bee.
SH+D | antpos.111113 | Nov 13, 2011 | CARMA23 track | Final D array solutions. C8 used as reference antenna. Final solutions in D array for all antennas except C20. No data for C20. These solutions have improved the data, although changes to the pad offsets from previous solutions are not large.
SH+D | antpos.111007 | Oct 07, 2011 | CARMA23 track | Solutions derived relative to C8. Flagged first half of the data with poor atmosphere and data at elevations < 30 deg. No data for C1 and C16. Offset from previous solution atmost 1mm. Curiously 0.5 - 1mm x and z offset seen for all SZA antennas.
SH+D | antpos.110903 | Sep 03, 2011 | CARMA23 track | Second baseline track. Solutions derived relative to C8. Offsets from previous solutions < 0.4 mm. Flagged data at elevations < 30 deg.
SH+D | antpos.110826 | Aug 26, 2011 | CARMA23 track | First baseline track after move to D. Solutions derived relative to C8. Flagged data at elevations < 30 deg. We have good solutions for all antennas. C6, C11 and C15 had large offsets (3 -- 6 cms).
SL+E | antpos.110818 | Aug 18, 2011 | CARMA23 track | The previous solutions were good to start with, so these solutions have marginally improved the data for all antennas. This is likely the last solutions for E array. Users encouraged to use this solutions for their dat set.
SL | antpos.110803 | Aug 03, 2011 | cm SZA track | Improved solutions for C17. C19 out of the array. Refined solutions for all other SZA antennas. The previous solutions (from July 21) were not updated in the system. Note that this is also the SH configuration although the antennas haven't been moved.
E+SL | antpos.110721 | July 21, 2011 | Second CARMA23 track | Improved solutions for C18. No fringes on C17 and C19 baselines and C23 out of the array. Refined solutions for all other SZA antennas. These solutions have significantly improved the data for C18 and should be used by SZA users.

E

antpos.110714

July 14, 2011

E array track with data on C10 after having zeroed the pad offsets

First solutions for C10. The raw offsets for C10 were off ~8cms (as reported by uvedit in miriad) relative to C8. The observers zeroed the pad offsets for C10 on 14 July 2011 before running the track from which the current solutions were derived. These solutions have significantly improved the data and should be used by users.

E+SL | antpos.110710 | July 10, 2011 | E & SL | Refined solutions for CARMA and SZA antennas with C8 as the reference. These solutions should be used for all tracks taken since the move to E. No fringes seen on baselines with C17. Failed to derive good solutions for C10. Solutions for C17 and C23 to be improved.
E | antpos.110709 | July 09, 2011 | First E array | Solutions derived for all CARMA antennas except C10. C8 is the reference. Phase slopes were fitted followed by iterative 4-parameter fit to derive the final solutions. Good solutions.
D | antpos.110706 | July 06, 2011 | Final D array (SZA not included) | Track was taken in CARMA 15 mode. C6 out of the array. It appears that the previous solutions (from 08 June) were not put into the system. Good solutions for all.
D+SL | antpos.110608 | June 08, 2011 | CARMA23 | Baseline solutions derived in CARMA23 mode. Solutions have improved data for all. But position offsets have changed by <0.01 ns.

D+SL

antpos.110511

May 11, 2011

CARMA23 mode baseline solutions

Baseline solutions derived for all except C11 in CARMA23 mode. CARMA antennas have moved by ~0.7 ns relative to C8, and SZA antennas by ~0.12 ns. Solutions have improved data for all. If you find incoherence in your data set after applying these solutions, please remove the comments (first line) from the antpos file. This is because the line does not wrap properly.

C+SL | antpos.110416 | April 16, 2011 | CARMA23 mode baseline solutions | Baseline solutions derived for all except C21 in CARMA23 mode after changing the North padOffset values by 200mm for all antennas, i.e. new_offset=old_offset+200mm. No data for C21 due to a Cal. Tertiary issue. C22 has moved by 0.34 ns relative to C8, and solutions for all others have improved.

C+SL

antpos.110414

April 14, 2011

First C array solutions

First solutions from the baseline track after the move to C was complete. Reference antenna is C8. All moved antennas show a ~0.7 ns offset relative to C8 (direction North). C8 is on pad 32 which is our reference antenna (had zero pad offsets). Later on, Steve Miller measured and reported that C8 is set down 0.76 ns North of its nominal position.

D+SL | antpos.110408 | April 08, 2011 | Second SZA baseline solutions in SL array | SZA baseline solutions for all except C22 after the move was complete. C21 moved by ~3cms relative to reference antenna C20. Good solutions for all (except C22). There appears to be a large pointing error on C22 (more than a beam).
D+SL | antpos.110330 | Mar 30, 2011 | First SZA baseline solutions in SL array | SZA baseline solutions on the first day of the move. C18, C19 and C22 have been moved. Derived solutions are for these antennas relative to C16. C22 moved by ~ 5 cms.
DZ | antpos.110315 | Mar 15, 2011 | First solutions for C11 and SZA | Solutions for derived C11, and C16 -- C23. Flagged data at elevation < 30 deg. Phase slope fitting followed by LSB-USB method and finally 4-parameter fit. C11, C18 and C19 moved by 22, 14 and 11 cms respectively (relative to C8). I assume this is because of receiver moves. We now have good solutions for all antennas in DZ.
DZ | antpos.110309 | Mar 09, 2011 | First solutions for C1-C15 (excluding C11). No SZA | first track after the move with only sci1 antennas. No fringes on C11 baselines, therefore no solutions for C11 yet. C8 used as reference antenna. Phase slope fitting followed by LSB-USB method and finally 4-parameter fit.
EZ (Carma 23 E) | antpos.110307 | Mar 07, 2011 | Final solutions for CARMA 23 in E array | First and only solution for C20. ~15 cms change for C20 relative to reference antenna C1. Only band 9 data has been used. Data affected by shadowing flagged. C23 baselines show large amplitude drops with HA, likley large pointing errors.

EZ (Carma 23 E)

antpos.110211

Feb 11, 2011

First solutions for CARMA 23 in E array

This is the first (ever) solutions for all antennas in the CARMA 2 array configuration. Good solutions derived for all, except C20. No fringes on C20 baselines. miriad antenna position update reports ~14 cms change for all SZA antennas relative to reference antenna C1. Final solutions derived by fitting phase slopes and 4 parameter fit in bee. Data with C20 baselines, and all bands except band 9 were flagged. Here are before and after plots for a subset of the baselines.

E | antpos.110120 | Jan 20, 2011 | Solution for E array after move was complete | Significant changes from the intial solution for C7, C8, C9, C10, C11, C13 and C15. C8 and C10 moved by ~18 cms and 12 cms relative to reference antenna C1. Final solutions derived by fitting phase slopes and 4 parameter fit in bee. Data with unusual gains (3c345 and 0730-116) had to be flagged.
E | antpos.110115 | Jan 18, 2011 | Sci1 baseline solution for E array | Solutions for C12 and C14. Move to E is not yet complete. A more updated solution for all antennas should follow once a full baseline track is taken. C12 and C14 moved by ~3.6 cms and 1.8 cms relative to reference antenna C1 (derived by fitting phase slope).
B | antpos.sza.101224 | Dec 24, 2010 | First (only?) Sci2 baseline data for B array | This solution from Mel. Summary: used average slope across 500 MHz bands. Antennas 16, 17, 19, 21 move by ~ 0.6 ns; others OK, relative to refant = 21
B | antpos.101224 | Dec 24, 2010 | First (only?) Sci1 baseline data for B array | This solution from Nikolaus (non-expert), not Thushara (expert). C9 used as reference antenna. Here are before and after plots for a subset of the baselines.

A

antpos.pacs.101213

Dec 13, 2010

First PACS track in A array

C2/C21 were the reference antenna. The sci1 solutions were based on pacs correction (except for 1 which did not have C17), and sci2 is just a normal track (pacs track from Dec 01). Reverse pacs did not work because of phase shifts caused in gpbuddy. C17 of course remains unchanged because C17 is out of the array. It is unclear whether this solution was ever applied to the system because this was derived by me (Thushara, who was away for a month), but was to be tested by PIs before applying it the system at CARMA. PIs, please contact Thushara if they have questions about this solution.

A | antpos.sza.101124 | Nov 24, 2010 | First PACS track in A array | C16 used as reference antenna (tried using C20, but failed to give good solutions), C17 out of the array. The changes to the initial solution are in the range 0.4 -- 3.0 cms (as reported by uvedit in miriad). The new solutions have significantly improved the data (see before and after plots).

A

antpos.101124

Nov 24, 2010

First A track

C8 reference antenna; The new solutions have significantly improved the data (see before and after plots), but are still preliminary for few antennas (C7 for e.g.) and needs to be refined with a new track. An xy only fit for a single target (wierdly) failed, and these solutions were based on iterations of phase slope and phase difference between LSB and USB on all sources.

C | antpos.sza.101112 | Nov 12, 2010 | Final track | C20 used as reference antenna, C17 out of the array. No significant changes from previous solutions as seen here.
C | antpos.101112 | Nov 12, 2010 | Final track | C8 reference antenna; C9 and C11 changed by ~+0.4mm in "x" offsets relative to Oct 09 solutions as seen here.
C | antpos.sza.101009 | Oct 09, 2010 | second track? | C20 used as reference antenna, improved solutions for all.
C | antpos.101009 | Oct 09, 2010 | Second track | C8 used as reference antenna; ~ 5 hours of good weather data; improved the initial solutions with only C5 showing >0.6 mm offsets from previous position.
C | antpos.100922 | Sep 22, 2010 | First C track | C8 used as reference antenna; satisfactory initial solutions for all antennas based on phase difference followed by 4-parameter fit method; solutions can be improved later on based on a better weather track.
D | antpos.100919 | Sep 19, 2010 | Final baseline track | C8 used as reference antenna. The previous solutions were not updated into the system. Changes from Aug 1 solutions however are < 0.4mm.
D | antpos.100906 | Sep 6, 2010 | Third baseline track | C8 used as reference antenna. C10 data is noisy. Changes to antenna positions is < 0.4mm as seen here.
D | antpos.100803 | Aug 3, 2010 | Second baseline track | C8 used as reference antenna. Track taken after setting the (large) delay offsets. Baseline solutions have been significantly improved.
D | antpos.100801 | Aug 1, 2010 | First track (for which solutions have been derived) | C8 used as reference antenna. Initial solutions for all antennas. Solutions for C3, C5 and C10 are significantly off (> 7 cms) from the initial offsets.
SH | antpos.Sci2.100728 | July 28, 2010 | Final SH-config | Best(?) baseline solution after switch to DSS.
E | antpos.100727 | July 27, 2010 | Final track | C9 used as reference antenna. No significant changes from the previous solution.
E | antpos.100708 | July 8, 2010 | Second track | C9 used as reference antenna. These are the first solutions for C6 (and moved by ~ 2.3 cms). The solutions have been improved for all other antennas, particularly those that were significantly off from the initial pad offsets.
E | antpos.100702 | July 2, 2010 | First E-array baseline track | C9 used as reference antenna. No data for C6. Solutions for C1 and C5 have been derived from an earlier very short baseline track and needs improvement. Good solutions for the rest of the array. The initial pad offsets off by ~ 4--6 cms for three antennas.
hybrid | antpos.100609 | June 9, 2010 | Third baseline track | C1 used as reference antenna. C10 baseline problem has been tracked down to a pointing issue. These are the first good solutions for C10. The initial pad offsets for C10 were off by ~ 7 cms!!
hybrid | antpos.100606 | June 6, 2010 | Second baseline track | C1 used as reference antenna. Flagged out some bad C17 & C22 data (issues with tertiary). These are the first solutions for C7. Refined solutions for all others except C10, which still has significant errors.
hybrid | antpos.100604 | June 4, 2010 | first fit for cm run | fit C1,C6,C8,C10,C13,C16-23 vs C14; C14 and all other antennas copied from antpos.100501; C7 not locked; C10 highly questionable; phase jump on C18
D | antpos.100530 | May 30, 2010; Final D-array track. | D-config | C8 used as reference antenna. No significant changes from previous solution (< 0.4mm).
D | antpos.100501 | May 1, 2010; Second D-array baseline track. | D-config | C8 used as reference antenna. Users with 2010 D-array data starting from 1 May until the next baseline update SHOULD use this solution.

D

antpos.100413

April 13, 2010; First D-array baseline track.

D-config

C8 used as reference antenna. After flagging the first half of the track with noisy data, the initial solutions were derived using phase-slope method and the 4-parameter fit in bee. Please note that the initial solutions were in error by ~ lambdas!!! Therefore, it is important that PIs who have data taken in D-array before 01 May 2010 use this solution.

C | antpos.100402 | April 02, 2010; Final C-array track. | C-config | C11 used as reference antenna. The corrections to all antenna positions except C4 and C6 are small as shown here . C4 and C6 solutions have improved the data.
C | antpos.100314 | Mar 14, 2010; Second C-array track. | C-config | C11 used as reference antenna. The first half of the data was taken under 200 -350 mu rms and the phase scatter is > 0.5 radian. The corrections to all antenna positions are small as shown here .
C | antpos.100301 | Mar 01, 2010; First C-array track. | C-config | C11 used as reference antenna. I used the slope method to get initial baseline solutions, which was then refined by applying to the raw data and re-deriving baseline solutions in bee (see before and after plots). The corrections to all antenna positions are significant (few cms!) as shown here .
A | antpos.100214 | Feb 14, 2010; Third (and probably final) A-array track. | A-config | C13 used as refant. Given that C4 was not in the array for the last baseline track, these are the first solutions for C4 (see before and after plots).
A | antpos.10015 | Jan 15, 2010; Second A-array track on the same night. | A-config | Very good weather conditions through out the track. C13 used as refant. C4 not in the array (see before and after plots). As shown in the plots, these baseline solutions have significantly improved the data.
A | antpos.100114 | Jan 14, 2010; First A-array track | A-config | Good weather conditions during the track. C13 used as refant. C4 not in the array (see before and after plots)
B | antpos.100105 | Jan 5, 2010 -- end of B-array | B-config | Good weather conditions during the track. C1 used as refant. C2, C3, C4, C5, C8 seem to have drifted by more than 0.4 mm compared to Dec 10, 2009 solutions (see comparison plot).
B | antpos.091210 | Dec 10,2009 | B-config | C1 used as refant. C8 has significantly drifted compared to Dec 4, 2009 solutions (see comparison plot).
B | antpos.sza.100105 | Jan 5, 2010 | SZA solutions derived by Vernesa | Good weather conditions during the track. C17 used as refant.
B | antpos.091204 | Dec 4, 2009 -- Jan 5, 2010 | second B-config solution w/ all antennas | Obtained good solutions for all antennas. Baseline solutions for Dec03 vs Dec04 is shown here. Phase vs time plots before and after the solutions have been applied.
B | antpos.091203 | Dec 3, 2009 -- start of B-configuration | first B-config solution w/ all antennas | Good enough to start science tracks, but I am still not satisfied with their accuracy (there is a lot of phase scatter in the fits; up to 0.9 radians, compared to 0.2-0.4 for good solutions; formal accuracy is better than 0.15mm).
SL | antpos.sza.091129 | Nov 29, 2009 -- end of SL-configuration | final SL-config solution | Seven hours of data. Run in PACS mode, so CARMA and SZA antennas were observing the same sources at the same times. SZA solutions were derived using MIRIAD's bee task. From Vernesa: "It's incredible how samll the phase scatter is in the fits (<0.1rad)."
C | antpos.091129 | Nov 29, 2009 -- end of C-configuration | final C-config solution | Seven hours of data. Run in PACS mode, so CARMA and SZA antennas were observing the same sources at the same times. There is > 0.4mm difference in the x position values for C8 and C9 as shown here.
C | antpos.091025 | Oct 25, 2009 -- start of configuration | first proper C-config solution | Solutions derived for all antennas.
C | antpos.091010 | Oct 10, 2009 -- start of configuration | first C-config solution | C3 behaved the worst (and we need to refine its solutions). C6, C11 were out, and C8 was used as refant. The solutions are good to start science tracks, but we need another track as soon as possible to refine the solutions.
D | antpos.090903 | Sep 03, 2009 -- end of configuration | third D-config solution | C8 used as refant. No major change compared to previous solutions; see here.
D | antpos.090808 | Aug 08, 2009 -- Sep 03, 2009 | second D-config solution | C12 used as refant; good solutions. Formal uncertainty is better than 0.15 mm; average scatter of the 4-parameter fits is about 0.2 rad. Phase vs. time plots before and after the solutions have been applied. Positions, compared to previous solutions, are here.
D | antpos.090723 | July 23, 2009 -- Aug 08, 2009 | first D-config solution | C12 used as refant; good solutions. Formal uncertainty is better than 0.22 mm; average scatter of the 4-parameter fits is about 0.2-0.3 rad. Phase vs. time plots before and after the solutions have been applied.

E

antpos.090713

July 13, 2009 -- July 23, 2009

E-config solution

C3 out of the array, C8 used as refant. C1, C2, and C4 have moved slightly more than 0.4mm compared to previous slolution in y, z, and x/z, respectively. C6 has significantly moved (~0.9mm in x; see comparisson plot) likely due to change of azimuth thrust rollers on this antenna. Phase vs. time plots before and after the solutions have been applied.

E | antpos.090613 | June 13, 2009 -- July 13, 2009 | E-config solution | Data reduced while in Japan! First E-config solution including C2.

C

antpos.090414

Apr. 14, 2009 -- June 6, 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 |

Since Jan 15 2010: Thushara Pillai "tpillai @ astro.caltech.edu"