Notes of the EISCAT KST UHF radar observations (Last updated on December 23, 2006.) ---------------------------------------------------- Pulse mode: arc1 Antenna mode: cp1 Altitude of the remote antenna beams: 250 km ---------------------------------------------------- 2006-11-16 00:00 UT - 2006-11-16 02:00 UT (2 hours) 00:14:38 UT *1, 01:50:45 UT *1 -Started data recording at 00:03 UT. -Transmitter power was stable (1.4-1.5 MW). -Sometimes cloudy, but relatively clear sky. -Disturbed ionosphere between 01:10 and 01:46 UT (See http://polaris.nipr.ac.jp/~yogawa/reimei200611/plot/2006-11-16_arc1_60_all@uhf.png) 2006-11-17 00:00 UT - 2006-11-17 02:30 UT (2.5 hours) 00:33:22 UT *2, 02:09:19 UT *1 -Started data recording at 00:02 UT. -Transmitter power was stable (1.4-1.5 MW). -Mostly cloudy. -Disturbed ionosphere after 00:00 UT (would be related to Southward turning of the IMF Bz) 2006-11-18 00:00 UT - 2006-11-18 03:00 UT (3 hours) 00:52:03 UT *2, 02:27:51 UT *1 -Started data recording at 00:00 UT. -Transmitter power was stable (1.4-1.5 MW). -Mostly cloudy. -Quiet ionosphere between 00:00 and 03:00 UT 2006-11-18 23:00 UT - 2006-11-19 03:00 UT (4 hours) 23:34 UT *1, 01:10:43 UT *2, 02:46:22 UT *1 -Started Reimei SP at 23 UT due to cancellation of the UK's SP (SP-UK-MISS) -Started data recording at 23:05 UT. -Transmitter power was stable (1.4-1.5 MW). -Mostly cloudy. -Electron density in the E-region increased between 02:00 and 03:00 UT . 2006-11-19 23:40 UT - 2006-11-20 01:40 UT (2 hours) 23:53:03 UT *1, 01:29:21 UT *1 -Started Reimei SP at 23:40 UT, but stopped and restarted it at 23:45 UT due to a problem with the Kiruna antenna (acu failed to bring AZIMUTH online). -Started Tromsoe and Sodankyla data recording (no Kiruna data) at 23:43 UT. -Transmitter power was stable (1.6-1.7 MW). -Clear sky, but very quiet ionosphere. -Sporadic E layer were clearly seen between 00:40 and 02:40 UT, probably due to the Leonid meteor shower. 2006-11-21 00:00 UT - 2006-11-21 02:00 UT (2 hours) 00:11:49 UT *1, 01:47:57 UT *1 -Started data recording at 00:00 UT. -Transmitter power was low (0.8 MW) in the beginning, but increased up to 1.7 MW at 00:08 UT. Crowbar occurred at 01:52 UT. -Mostly cloudy and very quiet ionosphere. 2006-11-22 00:00 UT - 2006-11-22 02:30 UT (2.5 hours) 00:30:32 UT *2, 02:06:31 UT *1 -Started data recording at 00:01 UT. -Transmitter power was low (1.4 MW) in the beginning, Crowbar occurred at 00:21 UT when the power was increased up to 1.7 MW. Transmitter power was about 1.4 MW between 00:22 UT and 02:30 UT. -Mostly cloudy, and extremely quiet ionosphere. 2006-11-23 00:00 UT - 2006-11-23 03:00 UT (3 hours) 00:49:14 UT *2, 02:25:03 UT *1 -Started data recording at 00:11 UT because of restarting the EROS. -Transmitter power was stable (1.5-1.6 MW), but crowbar occurred at 02:46 UT and stopped our experiment at 02:49 UT. -Mostly cloudy, sometimes clear sky. -Disturbed ionosphere after 18:00 UT on Nov. 22 (related to Southward turning of the IMF Bz). 2006-11-23 23:00 UT - 2006-11-24 03:00 UT (4 hours) 23:31:23 UT *1, 01:07:54 UT *2, 02:43:34 UT *1 -Started data recording at 23:03 UT after UK's experiment. -Transmitter power was unstable tonight. Crowbar and HV trip occurred at 00:29, 00:35, 00:45, 01:25 UT, and then Power trip occurred at 02:02 UT, so we reset Transmitter and restart at 02:20 UT. -Fortunately clear sky over Tromsoe. -Disturbed ionosphere tonight. In particular, electron density in the E region was high after 01 UT. 2006-11-24 23:30 UT - 2006-11-25 01:40 UT (2.2 hours) 23:50:11 UT *1, 01:26:31 UT *2, -The second priority (Finland's SP has the first priority), but after discussion with Thomas, we shear the KST UHF data and the EISCAT time (FI(1 hour), NI(1 hour)). -Started data recording at 23:30 UT. -Transmitter power was stable (1.4-1.5 MW). -Pointing altitude was changed from 250 km to 120 km at 00:38 UT because of extremely low electron density in the F-region. -Mostly cloudy. -Disturbed ionosphere. *1 MAC mode H, no EISA *2 EISA mode T and MAC, or MAC pointing observation and EISA