STEPS 2000
JD 00175 23 JUNE 2000FINAL SPRITE LOG
The following is the final listing of the times of sprites imaged at the Yucca Ridge Field Station. These are on visual inspection of the LLTV video monitoring system. All times are UTC. The times refer to the start of the 17 ms field in which the TLE was first visible.
SUMMARY: Full operations. Many sprites in or near LMA. Classic development of MCS off Denver cyclone convergence line. Smaller cells, several severe, gradually merged into larger MCS that moves basically eastward, though intense cores had clear right-moving tendencies. Numerous meso and hail reports from NEXRAD. Tops to 550-600 k ft with 66 dBZ reported. System nearly achieved MCC status (must check). Had very high percent positive until well after dark. Local debris clouds between YRFS and LMA made viewing difficult at times. Saw many sprites through holes in the clouds. After 0630Z, moon became a problem and could not cover all of the southern portion of the system. Sampled VLF, PD and Winckler PMT. Had some very good hits, but trigger device was sticky and missed some samples. Some telescope views. GEN III again appeared to provide better detection efficiency. Heard many more VLF sprites that actually saw on LLTV due to persisting clouds. Sprites gradually waned after 0700Z as storm weakened. Some spotty cloud tops to –75C just after dark. Mark Stanley could not use interferometer but did record field changes. Three tapes with red patrol, red zoom and red tele. Also 3 S-VHS copies with GPS of GEN III system (with 5 DVD tapes). Some VLF interference until source found around 0600Z. Visibility fairly good, but some haze remains.
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(S) = Sprite; (E) = Elve; (B) = Blue Jet; (CF/CG) = Cloud/Ground flash; (M)=Meteor
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ON 0305Z
OFF 0802Z
03:27:51.171 [S]
03:28:16.213 [S-]
03:28:47.995 [S]
03:30:24.993 [S]
03:30:52.621 [S]
03:32:24.531 [S]
03:32:54.319 [S-]
03:34:00.928 [S]
03:35:06.661 [S-]
03:35:37.993 [S]
03:35:41.413 [S]
03:36:32.214 [S-]
03:36:33.582 [S--]
03:37:21.965 [S]
03:37:55.332 [S]
03:38:21.425 [S-]
03:38:25.513 [S]
03:39:01.082 [S-]
03:39:03.685 [S-]
03:39:50.432 [S-]
03:40:13.555 [S-]
03:40:26.704 [S]
03:40:53.089 [S-]
03:41:12.832 [S]
03:41:40.777 [S]
03:42:24.321 [S-]
04:01:14.333 [S+]
04:04:40.488 [S]
04:05:22.948 [S]
04:06:55.458 [S]
04:08:01.991 [S]
04:09:08.226 [S-]
04:09:44.146 [S]
04:10:24.536 [S]
04:11:54.594 [S]
04:13:03.163 [S-]
04:13:15.626 [S-]
04:13:24.869 [S]
04:13:47.608 [S]
04:14:19.991 [S-]
04:14:22.110 [S-]
04:16:00.727 [S-]
04:16:28.638 [S]
04:17:33.370 [S]
04:18:21.680 [S-]
04:18:48.808 [S]
04:19:48.718 [S-]
04:19:51.550 [S]
04:20:31.161 [S-]
04:20:48.473 [S]
04:22:03.521 [S-]
04:32:51.613 [E]
05:55:56.289 [S]
05:59:12.115 [S]
06:01:22.918 [S]
06:03:09.310 [S-]
06:05:47.000 [S]
06:10:29.054 [S]
06:12:33.172 [S]
06:14:36.017 [S]
06:14:35.235 [S]
06:17:24.854 [S]
06:21:02.721 [S]
06:21:02.988 [S]
06:22:44.252 [S]
06:24:48.261 [S]
06:27:20.865 [S]
06:29:46.729 [S]
06:32:35.883 [S]
06:39:59.219 [S]
06:43:54.687 [S]
06:48:09.858 [S]
06:49:26.733 [S]
06:54:04.728 [S-]
06:58:16.312 [S]
06:58:16.512 [S]
07:00:47.761 [S]
07:03:14.377 [S]
07:06:31.223 [S]
07:10:45.041 [S]
07:14:52.288 [S]
07:18:06.044 [S]
07:22:28.309 [S]
07:22:28.542 [S]
07:27:44.657 [S/dancer]
07:36:30.464 [S]
07:52:29.107 [S]