2023 June

Daily observation notes published from the eovsadata canonical log.

June 07

Observations

16:00 UT Calibrations did not run for June 6. The LNA voltages on the 27m were all zero. I rebooted the brick, initialized the LNA and homed the receiver.

Antenna availability: automatic assessment.

June 08

Observations

17:30 UT Frequency Tuning had locked up. Trying to reboot did not work. The ACC VI could not be started. The Windows computer was rebooted, as was the ACC before observations were resumed. About 1 hour of observing time was lost.

Antenna availability: automatic assessment.

June 13

Observations

23:00 UT The 27-m control system started acting up (immediate symptop was 0.0 LNA readings on the CryoRX display). The problem was traced to a bad TCP communication with the feanta computer, although all components could be pinged successfully. No evening reference calibration was possible.

Antenna availability: automatic assessment.

June 14

Observations

12:24 UT This morning I cycled power to the feanta computer and reset the brick controller. Everything is now working again, but not until 12:23 UT or so, which means this morning's reference calibration will be no good.

15:06 UT The data was stuck recording as phasecal even when the array was pointing at the Sun. Restarting the schedule rectified the problem. About 90 minutes of data was lost.

Antenna availability: automatic assessment.

June 15

Observations

19:30 UT Dynamic spectrum looked bad. ADC_plot was restarted but made no improvement.

Antenna availability: automatic assessment.

June 16

Observations

19:50 UT The 27m antenna would not move. There was a hydraulic fluid alarm and cable tension alarm. Mark Hodges found several blown fuses. On starting the hydraulic pump, it made a clunking sound. The antenna stowed and no calibrations will be done until it can be inspected on the 20th.

Antenna availability: automatic assessment.

June 20

Observations

16:53 UT After inspection of the 27m Hydraulic pump, it was determined that it had failed. A replacement will be ordered. Until the pump is replaced, no calibrations can be performed.

Antenna availability: automatic assessment.

June 23

Observations

17:24 UT The ACC locked up. It required a restart.

Antenna availability: automatic assessment.

June 26

Observations

19:10 UT The DPP was unreachable from any other machine, and no data was being recorded. It required a complete power down and restart.

Antenna availability: automatic assessment.