July 12, 2001 KST UHF operation memorandam for July 9 BY S. Nozawa Experiment name: SP-NI-TG2 elan files: cp1lt_tg2_ni.elan, cp1lk_tg2_ni.elan, cp1ls_tg2_ni.elan directory: /kst/exp/cp1lt_tg2_ni (cp1lk_tg2_ni , cp1ls_tg2_ni ) Pulse scheme: cp1lt Start time: 10:00 UT on July 9, 2001 End time: 12:30 UT on July 10, 2001 Participants: Satonori Nozawa, Sawako Maeda (PI), Seiko Imaida (ESR operation was conducted by Yasunobu Ogawa) Before our experiment: Nothing We made a test from 7 UT to 9 UT, and found that the receiver (or related others) were problematic. After our experiment: Nothing --------------------------------------------------------------------------- Note: (time in UT) July 9 10:00 START without Kiruna: Kiruna has a problem with "polarizer" 1.2 MW -> 1.6 MW -> 1.2 MW 10:15 @antenna position is wrong: due to EROS bug (After "stopexp" we need to logout EROS and restart EROS at any sites used.) 10:18 Tromso recovered 10:46 Sodankyla recovered Failue due to "high power reflector" occured OFTEN 11:58 Transmitter failure: Kind of "safety lock":it takes 10 minutes to -12:14 get the transmitter on..... 12:14 1.6 MW 12:30 Tx down (means failue of transmitter occurred) 12:43 Tx down Tx = 1.2 MW 13:16 Tx down 13:39 Kiruna recovered (some time before) 14:14 Tx down 15:52 Tx down 16:04, 16:07, 16:17, 16:27, 16:53 Tx down 16:56 sod setclockdely (but, nothing happened) 17:03, 17:11,18:22, 18:58, 19:13, 19:33, 19:48, 19:58,20:07 Tx down 20:13 Stop SYSTEM (Tx) for 12 minutes due to high temperature of the room (no air conditionar worked! It was above 40 deg.) 20:57 1.8MW 23:57 July 10 00:07-08 Tx down 00:11-13 Tx down 00:27-30 Tx down 00:42-46 Tx down 00:46 1.3MW 01:31 sod antenna position was strange:not followed by the command AZACU 308.02 ELACU 18.01 <--- pointing AZCOM 341.49 ELCOM 18.02 <--- command This kind of "problem" occurred when tromso pointing north AND south, but NOT always. 01:32- Txdown 01:37 02:07 Tx down 02:23- Tx down: a electric board was changed ? 02:33 02:45 Tx down 02:50 Tx down 03:06 Tx down 03:46 sod Az got strange: AZACU 308.02 ELACU 48.32 <--- pointing AZCOM 243.60 ELCOM 35.11 <--- command 04:33 sod Az got strange 05:08 sod Az got strange 05:38 Tx down 06:07 Tx down 06:50 sod Az got strange 07:06 Tx down 07:14 Tx down 08:05 Tx down 08:09 Tx down 08:13 Tx down 08:43 Tx down 09:44 Tx down 1.6 MW ? 10:09 Tx down 10:11 Tx down 10:16 Tx down 10:22 Tx down 11:04 Connection with Kiruna down (due to thunderstorm ?) 11:55 called Kiruna and confirmed it was running 12:07 Connection with Kiruna recorved 12:20 Tromso antenna got a problem. Serious!!!!! 12:30 END --------------------------------------------------------------------------- Summary: Transmitter failue occured so often. So, we reduced the power and made experiment with 1.2 MW. Very often we got no-spectra view with rtg at remote. I am not sure if this is a problem with data or just display (rtg), but it seems like a problem of "clockdelay" ? ---------------------------------------------------------------------------