Notes of the Tromso UHF and heater observations
               (Last updated on Feb. 28, 2007.)

Participants in the EISCAT observations in Tromso:
Satonori Nozawa, Shin-ichiro Oyama, Hiroshi Handa (Nagoya Univ.)
Yasunobu Ogawa (NIPR)

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2007/02/16 10:00-12:00 UT (2 hours, UHF and Heater):
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EISCAT UHF radar:
 Pulse code: arc1
 Antenna mode: sweep_pattern.elan
  (puny:/kst/exp/ni/arc1/scans/)
 Cycle period: 60 sec.
 EL: 59-89 deg
 AZ: 180 deg
- Tx power: 1600 kW

Heater:
- Polarization: O mode,
- Direction: -12 deg
- Frequency: 4.04 MHz
- Power: 85 kW
- Array: 2
- start from 10:02 UT, 2min on, 2min off.
- Tx8 power variable

Electron density in the F-region was low (1.5*10^11 m^-3).
Cannot see heater signatures clearly.
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2007/02/23 09:00-12:10 UT (3 hours, UHF and Heater):
-------------------------------------------------------------
EISCAT UHF radar:
 Pulse code: arc1
 Antenna mode: sweep_pattern.elan
  (puny:/kst/exp/ni/arc1/scans/)
 Cycle period: 60 sec.
 EL: 59-89 deg
 AZ: 180 deg
- 09:00-12:00 UT
- Tx power: 1600 kW
- Crowbar (Tx power of the UHF radar was 0 kW):
  0931:10-0932:10 UT
  1121:32-1122:00 UT
  1156:45-1158:20 UT

Heater:
- Polarization: O mode,
- Direction: -12 deg
- Power: 85 kW (x9)
- Array: 1 and 2

Time (UT)     Frequency,  Array,  Heater on/off
0910-0932    5.423 MHz, array1,  4min on, 2 min off
0940-0942:15 4.913 MHz, array2,  CW (tune)
0946-1002    4.913 MHz, array2,  4min on, 2 min off
1004-1014    5.423 MHz, array2,  4min on, 2 min off
1016-1126    4.913 MHz, array2,  4min on, 2 min off
1028-1208    4.544 MHz, array2,  4min on, 2 min off

Heater on (UT):
0910-0914
0916-0920
0922-0926
0928-0932
0940-0942
0946-0950
0952-0956
0958-1002
1004-1008
1010-1014
1016-1020
1022-1026
1028-1032
1034-1038
1040-1044
1046-1050
1052-1056
1058-1102
1104-1108
1110-1114
1116-1120
1122-1126
1128-1132
1134-1138
1140-1144
1146-1150
1152-1156
1158-1202
1204-1208

Electron density in the F-region was about 3*10^11 [m^-3].
Heater signatures were clearly seen in Te plot.

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2007/02/26 09:30-12:30 UT (3 hours, UHF and Heater):
-------------------------------------------------------------
In cooperation with Leicester University (Darren Wright).

EISCAT UHF radar:
 Pulse code: tau2pl
 Antenna mode: sweep2_pattern.elan
  (puny:/kst/exp/ni/tau2pl/scans/)
 Cycle period: 60 sec.
 EL: 59-89 deg
 AZ: 180 deg
- 09:30-12:30 UT
- Tx power: 1600 kW
- Crowbar (Tx power of the UHF radar was 0 kW):
  1026-1034 UT

Heater:
- Polarization: O mode
- Direction: -12 deg
- Power: 85 kW (x9, x8 after 1211 UT)
- Array: 2

Time (UT)     Frequency,  Array,  Heater on/off
0930-1058    4.544 MHz, array2,  4min on, 2 min off
1100-1134    4.913 MHz, array2,  4min on, 2 min off
1136-1159    4.913 MHz, array2,  3min on, 2 min off
                                 (to save power)
1201-1229    5.423 MHz, array2,  3min on, 2 min off


Heater on (UT):
0930-0934
0936-0940
0942-0946
0948-0952
0954-0958
1000-1004
1006-1010
1012-1016
1018-1022
1024-1028
1030-1034
1036-1040
1042-1046
1048-1052
1054-1058
1100-1104
1106-1110
1112-1116
1118-1122
1124-1128
1130-1134
1136-1139
1141-1144
1146-1149
1151-1154
1156-1159
1201-1204
1206-1209
1211-1214
1216-1219
1221-1224
1226-1229

Electron density in the F-region was about 3*10^11 [m^-3].
Heater signatures were clearly seen in Te plot and plasma
line data.

-------------------------------------------------------------
2007/02/27 09:30-13:00 UT (2 hours, UHF and Heater):
-------------------------------------------------------------
In cooperation with Leicester University (Darren Wright).

EISCAT UHF radar:
 Pulse code: tau2pl
 Antenna mode: sweep2_pattern.elan
  (puny:/kst/exp/ni/tau2pl/scans/)
 Cycle period: 60 sec.
 EL: 59-89 deg
 AZ: 180 deg
- 09:30-13:00 UT
- Tx power: 1600 kW
- Crowbar:
  10:23-10:25 (0 kW)
  10:32-10:36 (0 kW)


Heater:
- Polarization: O mode
- Direction: -12 deg
- Power: 85 kW (x9.  Tx2 was unstable.)
- Array: 2

Time (UT)     Frequency,  Array,  Heater on/off
0930-1000    4.913 MHz, array2,  4min on, 2 min off
1100-1130    5.423 MHz, array2,  4min on, 2 min off
1130-1300    4.913 MHz, array2,  4min on, 2 min off

Heater on (UT):
0930-0934
0936-0940
0942-0946
0948-0952
0954-0958
1000-1004
1006-1010
1012-1016
1018-1022
1024-1028
1030-1034
1036-1040
1042-1046
1048-1052
1054-1058
1100-1104
1106-1110
1112-1116
1118-1122
1124-1128
1130-1134
1136-1140
1142-1146
1148-1152
1154-1158
1200-1204
1206-1210
1212-1216
1218-1222
1224-1228
1230-1234
1236-1240
1242-1246
1248-1252
1254-1258

Electron density in the F-region was about 3*10^11 [m^-3], 
and ion acoustic and Langmuir turbulence due to the heating 
were clearly seen.

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