JD: 00-185 DoW: SUN/MON UTC Date: 02JULY2000

SUMMARY: TLEs from Two Storm Types; Great Gravity Waves

TLE PREDICTION: 0.32 [0.4 x 0.80]

RESULTS: 25+ events from two storms GREAT GRAVITY WAVES

LESSONS: Good example of a supercell without TLEs-but many ICs

PERSONNEL: Lyons, Nelson, Fossum, Nordem, Gerken

STEPS STATUS: STEPS down.

YRFS OPERATION LOGS: Two major systems within view. The first was a weird linear MCS-squall line with tops to 650, hail, TVS and mesos which moved to the south-southwest from SE Nebraska into Northeast Kansas. Clouds cleared to allow us to watch this first,. It had a brief flurry of sprites around 0450 and then slow down and stopped. GEN III could easily see cloud flashes at 550 – 600 km. Major gravity waves seen in both GEN III and especially the USU imager. They looked like altocumulus clouds in the OH! (The imager was tilted off its axis and rather risk damage in a repair, we just left it).

Clouds finally cleared and we began to see some occasional sprites from a large slowly moving MCS in southeast CO that had rather high tops. The percent positive in both systems was rather low, so this may explain the rather low sprite production. As the CO system weakened, sprites stopped. Shut down at 0715Z.

GAI receiver arrives. No time to set up. Taylor and Gardner at Pingree Park.

STEPS OPERATIONS: STEPS shuts.

KEY RESULTS : have two rather distinct types of MCS, both with low positive rates and low TLE rates. Gravity waves evident from severe weather line but not large MCS.

Total TLEs from Yucca Ridge This Campaign: 900

FMA

Red Xybion (A)-Patrol: 2 tapes

Sony TRV900 3CCD: time lapse of late storm; 2 S-VHS at night

GEN III unit; 4 DVs of sprites and gravity waves

JVC KY-19: shoot daytime TL/STEPS Cam (to ESE);

Pulnix CCD: shoot various TL scenes

Photodiode: Tested with several tubes and gains

Winckler PMT: available-too close to horizon to use

GPS: OK

WWV Source: OK

VLF Inspire: took many samples

ELF N-S: not available

ELF E-W: not available

NLDN Live: OK

NLDN Paper: 12 maps

NLDN Archive: 4 saves

MRC Data Acquisition: many VLF samples

FMA Data Acquisition: not available

Thunder Mic: available

LANL Tracker: OK

Red Xybion (B)-Zoom; 2 tapes (on tracker)

Red Xybion (C)-Tele: 2 tapes-on tracker

Blue Xybion(D)-zoom: 0 tapes - problems with focus

Mountain Cam: nominal

STEPS Cam: nominal

Shure Mic: OK

NEXRAD Archive: Revised EDIS, many manual

GOES Archive: OK

RUC2 Archive: OK

STANFORD/STAR LAB:

Telescope gets some shots

LLTV yes

ELF/VLF yes

UTAH STATE UNIVERSITY:

Xybion GEN III (6 deg FOV) filter blows off, can’t use

White or blue

CCD, Medium FOVOH imager excellent gravity wave images (camera tilted)

Gravity waves/sprites

MIT ELF: operational

FUELLEKRUG ELF: operational

ISRAELI ELF: nominal