2026 April¶
Daily observation notes published from the eovsadata canonical log.
April 01¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 10:00 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-01 10:25 UT. |
| 15:14 | 16 | 1, 3-8, 10, 12-13 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| Normal startup this morning. | ||
| The new antenna mounts were showing offsets (stuck RA) / RA 00:43:50 (Old) and 00:41:39 (New) at 15:30UT. / Skipped the PHASECAL at 19:59UT |
Antenna availability: automatic assessment.
April 02¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:56 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-02 10:21 UT. |
| 15:14 | 16 | 1, 3-8, 10-12 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| Normal startup this morning. | ||
| The new antenna mounts were showing offsets (stuck RA) / RA 00:47:30 (Old) and 00:45:18 (New) at 15:30UT. | ||
| 13 | Ant13 got stuck at 15:30 UT. $pcycle at 15:50 UT |
Antenna availability: automatic assessment.
April 03¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 3:58 (Apr 4) | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-03 13:00 UT. |
| 15:14 | 16 | 1, 3-6, 8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
| 19:54 | 16 | 1, 3-6, 8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
| 23:14 | 16 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| Windscram during the morning calibration. | ||
| Spectrograms are missing some specfic bands. |
Antenna availability: automatic assessment.
April 04¶
Observer: Caius Selhorst
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:48 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-04 10:13 UT. |
| 15:14 | 16 | 1, 3-6, 8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
| 19:54 | 16 | 1, 3-6, 8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
| 04:15 (Apr 5) | 60 | 1, 3-8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant2 drive is stuck. |
Antenna availability: automatic assessment.
April 05¶
Observer: Caius Selhorst
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:44 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-05 10:09 UT. |
| 15:14 | 16 | 1, 3-6, 8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
| 19:54 | 16 | 1, 3-8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
| 23:14 | 16 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
| 04:11 (Apr 6) | 60 | 1, 3-12 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant2 drive is stuck. |
Antenna availability: automatic assessment.
April 06¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:40 | 79 | 1, 3-12 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-06 10:05 UT. |
| 15:14 | 16 | 1, 4-8, 10-12 | Successful Phase calibration. Analysis written to SQL. |
| 19:54 | 16 | 1, 3-12 | Successful Phase calibration. Analysis written to SQL. |
| 23:14 | 16 | 1, 3-12 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| Ant3 and Ant9 got stuck in the mornind. / $pcycle at 15:45UT |
Antenna availability: automatic assessment.
April 07¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:36 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-07 10:01 UT. |
| 15:14 | 16 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
| 19:54 | 16 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
| 23:14 | 16 | 1, 3-8, 10, 12 | Successful Phase calibration. Analysis written to SQL. |
| 4:03 (Apr 8) | 60 | 1, 3-8, 10, 12 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
Observations
Normal startup today.
Antenna availability: automatic assessment.
April 08¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 3:38 (Apr 9) | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-08 13:00 UT. |
| 9:53 | 60 | 1, 3-8, 10, 12 | Successful Phase calibration. Analysis written to SQL. |
| 15:14 | 16 | 1, 3-8, 10, 12 | Successful Phase calibration. Analysis written to SQL. |
| 19:54 | 16 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| One of the DCMs power supplies fail due to a bad fuse. / The fuse was replaced around 18:45 UT. / The problem affected Ant9, 11 and 13. |
Antenna availability: automatic assessment.
April 09¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:29 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-09 9:54 UT. |
| 15:14 | 16 | 1, 3-10, 12-13 | Successful Phase calibration. Analysis written to SQL. |
| 19:54 | 16 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
| 3:56 (Apr 10) | 60 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| 11 | Ant11 got stuck in the morning. / $pcycle at 15:50UT |
Antenna availability: automatic assessment.
April 10¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:25 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-10 9:50 UT. |
| 15:14 | 16 | 1, 3-10, 12-13 | Successful Phase calibration. Analysis written to SQL. |
| 3:52 (Apr 11) | 60 | 1, 3-8, 10-13 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| Normal startup today |
Antenna availability: automatic assessment.
April 11¶
Observer: Caius Selhorst
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:21 | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-11 9:46 UT. |
| 3:48 (Apr 12) | 60 | 1, 3-13 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant2 drive is stuck. |
Antenna availability: automatic assessment.
April 12¶
Observer: Caius Selhorst
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 3:23 (Apr 13) | 79 | 1, 3-13 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-12 13:00 UT. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant2 drive is stuck. |
Antenna availability: automatic assessment.
April 13¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 3:23 (Apr 14) | 79 | 1, 3-5, 7-8, 10-11 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-13 13:00 UT. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| 13 | Ant 13 wasn't tracking in the morning. $pcycle @15:30UT / Manlight and ROACH5 stopped working again. | |
| After restarting the ROACHs, we started new PHASECALs to set the delays |
Observations
ROACH5 and Manlight were restarted. New delays were set for most of the antennas, except 6, 9, 12-13.
Antenna availability: automatic assessment.
April 14¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:09 | 79 | 1, 3-5, 7-8, 10-11 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-14 9:34 UT. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| 6, 9, 12-13 | Ant6, 9, 12-13 need delay corrections. |
Observations
Normal startup today.
Antenna availability: automatic assessment.
April 15¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Solar activity: Solar activity is low.
Calibrations
| Start (UT) | Duration (min) | Antennas | Details |
|---|---|---|---|
| 9:05 | 79 | 1, 3-5, 7-8, 10-11 | Successful Reference calibration for bands < 30. Analysis written to SQL @2026-04-15 9:30 UT. |
| 12:28 | 60 | 1, 3-5, 7-8 | Successful Phase calibration. Analysis written to SQL. |
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 00:00–23:59 | 2 | Ant 2 still out with Dec controller problem.; Ant2 drive is stuck. |
| The 27m has a leak in the cryogenic pump that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 6, 9, 12-13 | Ant6, 9, 12-13 need delay corrections. |
Observations
Normal startup today.
Antenna availability: automatic assessment.
April 16¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 6, 9, 12-13 | Ant6, 9, 12-13 need delay corrections. |
Observations
Normal startup today.
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 17¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
Normal startup today.
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 18¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
Normal startup today.
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 19¶
Observer: Caius Selhorst
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 20¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
Normal startup today.
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 21¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| Normal startup today. / The power supplies on Ant9, 11 and 13 were set to 12.40V at both sides | ||
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 22¶
Observer: Caius Selhorst
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 23¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
Normal startup today.
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 24¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
Normal startup today.
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 25¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| 3 and 12 | Ant3 and 12 got stuck in the morning. | |
| 12 | Ant12 $pcycle at 15:12UT | |
| 3 | Ant3 fixed on Win1 antenna controler at 15:16UT | |
| 15 | Ant15 started tracking at 15:21UT | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 26¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
Normal startup today.
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 27¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| 3 | Ant3 got stuck in the morning. / $pcycle at 15:34 UT | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 28¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| 3 | Ant3 got stuck in the morning. / $pcycle at 15:19 UT | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 29¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| 3 | Ant3 got stuck in the morning. / $pcycle at 15:30 UT | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.
April 30¶
Observer: Caius Selhorst
Configuration: ATA feed is on Ant6.
Issues and outages
| Time (UT) | Antennas | Details |
|---|---|---|
| 2 | Ant 2 still out with Dec controller problem. | |
| 3 | Ant3 got stuck in the morning. / $pcycle at 15:39 UT | |
| On April 15th, the 27m has a leak in the cryogenic pump / that drained all the helium. / Mark and Charlie are trying to fix it. / Probably it'll take one week of work. | ||
| 9, 12-13 | Ant9, 12-13 need delay corrections. |
Observations
April 16 to June 5
No Calibrations between April 16th and June 5th due to problems with the 27 m (Leak in the cryogenic pump lines.)
Antenna availability: automatic assessment.