EC092

Session: Jun 2023 (session 2)

Wavelength: 1.3 cm

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Experiment Feedback

Hartebeesthoek (Jonathan Quick at Mon Jun 05 19:37:40 2023) Success:

No known problems.

Yebes (Ángel V. Lozano at Mon Jun 05 21:19:28 2023) Success:

No Known problem

Tianma65 (Bo Xia at Tue Jun 06 04:08:25 2023) Failure: ANT

UT 02:18-05:50 stop obs for system checking UT 15:00 stop the observation due to the antenna problem

Noto (Salvo Buttaccio at Tue Jun 06 06:38:03 2023) Failure: ANT

Medicina (Giuseppe Maccaferri at Tue Jun 06 07:47:24 2023) Success: HIGH

Non optimal weather conditions for K band

Effelsberg (Uwe at Tue Jun 06 09:08:28 2023) Success:

Missed 5 scans, probably because of longer slew times. #Time(source cmd) Scan Source 2023.154.19:57:50.24 24 1639-062 missed 2023.154.20:03:18.64 25 1749+096 missed 2023.154.22:04:17.24 46 1753+204 missed 2023.155.01:09:34.23 76 0017+200 missed 2023.155.21:35:42.23 259 1556-245 missed

Yebes (Cristina Garcia Miro at Tue Jun 06 13:51:37 2023) Success: HIGH

Very bad weather for K-band affected the beginning and several periods of the 48h observation (afternoon storms both days).

KVN_Yonsei (Jongho Park at Thu Jun 08 01:47:42 2023) Minor failures: RECO

June 3rd, UT 18:44-18:50, we found that the connection between the antenna control system and the fluxbuff recorder was lost, but after investigating the recorded data, it seems that the recording itself was okay. But there could be some impacts on the data recorded during this period and we remark the issue here.

KVN_Ulsan (Jongho Park at Thu Jun 08 01:47:51 2023) Success:

Onsala (Jun Yang at Mon Jun 19 09:07:44 2023) Minor failures: ANT

About 20 scans were missed because the keyword value AX1LIM was incorrect in the NRAO Sched station data file and the 20-m antenna failed to get the proper wrap/unwrap commands from the SNAP file. The incorrect keyward value did not affect our astro-VLBI observations until our antenn control system has recently started to support wrap/unwrap function.

Jodrell_Bank (Alastair Gunn at Tue Jun 20 08:00:24 2023) Minor failures: TSYS

Looks like noise diode had failed; hence antab file useless. No other known problems.