COORDINATED FLIGHT LEGS, DC8 AND OTHER AIRCRAFT, TOGA-COARE
Following is a list of DC8 legs which, I believe, are all worth looking
at, on the basis on near-simultaneous coverage from the ER2, turboprops, or
both. I will indicate below by brief annotation which subset might be most
important and why.
(Ed Zipser, helped by many. 26 July 93 update.)
*=suggested priority leg. All dates and times are in UTC.
*18 Jan: DC8 0229-0248. Track 105 .
ER2 has 270 track, 0229-0247, so best crossover is near middle of
track,
0235-0241, but good echoes throughout track, and EXCELLENT radar coverage
by 3 turboprops AND Vickers radar.
ER2: 0229-0247.
*4 Feb. DC8, 1710-1725. (no turboprops this date)
ER2 overhead on same track. Passes over and through strong convection
near the forming eye of Oliver.
ER2: 1713-1727.
*4 Feb. DC8, 1900-1910.
ER2 overhead on same track about 4-5 minutes apart. SSM/I pass during
this track. Direct pass through center of MCC on west side of Oliver; AMPR
preliminary data shows TB=83 K, clouds are electrified.
ER2: 1901-1912. PRIZE PASS!!!!
*6 Feb., DC8, 1759-1813.
DC8 parallel to NOAA 42 and 43 tracks; orthogonal to Electra track.
Well
coordinated through strong echoes, probably electrified.
(no ER2)
*6 Feb., DC8, 2000-2018.
Track of DC8 is parallel to all turboprops, which are all flying in
oppposite direction, so best coordination in central part of track.
(no ER2)
8 Feb., DC8, 2045-2100; 2130-2150 (times approximate).
I believe that the ER2 was well coordinated during these two overflights
of the eye of Oliver. I should have better information in this in a few
days.
ER2: 2041-2105; AND 2132-2159. (no turboprops this date)
10 Feb., DC8, 2151-2205. Tk 248 . T=-38 C
10 Feb., DC8, 2211-2224. Tk 075 . T=-24 C
The above two legs are nearly over the same track, and both cross all
three turboprops flying N-S. 2200-2202: turboprops pass under DC8 track
4-6 minutes earlier. 2220-2222: turboprops pass under DC8 track within two
minutes. System is dissipating with stratiform precipitation.
10 Feb., DC8, 2345-2353. Through or over heavy convective echoes; over one
P3 simultaneously, 2nd P3 with parallel radar coverage (quad-Doppler) 40 km
to north along gust front.
10 Feb., DC8, 2357-2400. Brief leg over gust front with one P3 below.
(no ER2 this date)
17 Feb., DC8, 2218-2238, W to E, turboprops near.
17 Feb., DC8, 2258-2315, N-S. Best 2302-2314, turboprops on opposite
track, S-N.
17 Feb., DC8, 2319-2331, S-N. Electra nearly same track, opposite heading,
N-S.
17 Feb., DC8, 2333-2346, N-S. ARMAR notes heavy rain @2342.
*20 Feb., DC8, 2226-2240, S-N.
One of best coordinated legs in COARE; ER2 on identical track few
minutes
apart, well covered by both P3s. ARMAR notes heavy rain @2234-2236.
ER2: 2224-2239.
*20 Feb, DC8, 2245-2259, N-S.
Similar coordination as for above track. ARMAR sees heavy rain, also
bright band regions, starting at 224651.
ER2: 2245-2258.
20 Feb., DC8, 2304-2321, S-N.
Similar coordination as for above tracks. 30K', system seems to be
weakening.
ER2: 2304-2323.
20 Feb., DC8, 2328-2347, N-S.
Similar coordination as for above tracks. System weakening.
ER2: 2330-2348.
*22 Feb, DC8, 2120-2138, W-E.
Near-perfect coordination with ER2 (same track 3 min behind) and
with two
P3's from 2128-2138. Intense squall line system; NASA aircraft cross both
stratiform (W) and convective regions (E).
ER2: 2124-2143.
22 Feb., DC8, 2142-2156, E-W.
As above until 2147, then DC8 deviates N of ER2 track.
ER2: 2147-2157.
*22 Feb., DC8, 2159-2214, W-E. Best 2200-12.
Near-perfect coordination with ER2 just 1-2 min behind. DC8 makes some
shallow turns.
ER2: 2201-2214.
*22 Feb., DC8, 2217-2231, E-W. Best 2219-30.
Near-perfect coordination with ER2, turboprops. DC8 makes turns.
ER2: 2218-2230.
22 Feb., DC8, 2232-2248, W-E.; 2251-2258, E-W.
Maybe OK but this is probably after wetting and pressurization problems;
suggest waiting for confirmation before doing these.
ER2: 2234-2248.
------------------------- ============ ----------------------------------
Ed Zipser, Prof. and Head || Internet: zipser@ariel.tamu.edu
Dept. of Meteorology || OMNET (Telemail): E.ZIPSER
Texas A&M University /\ || |\/| Telephone (409)-845-7671
College Station, TX | | || | | Fax Number (409)-862-4466
77843-3150 |--| || | |
------------------------- | | || | | ----------------------------------
Last update:Tue Jan 6 11:48:47 EST 2004
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