WIRE and other obs

Daniel Deak (dan.deak@sympatico.ca)
Mon, 08 Mar 1999 22:16:20 -0500

Hi everybody,

      Here are my positional observations for the evening of March 8, 1999 :

25017 97 064A   1745 E 19990309002241300 37 25 0114500+605500 68 S+035 07
07816 75 043A   1745 E 19990309005959000 37 25 0430000+134800 68 M+030 07
10033 77 044A   1745 E 19990309003654700 37 25 2336000+854000 68 M+050 07

25017 is Lacrosse 3
07816 is DMSP 7
10033 is AMS 2 (DMSP F2)

About DMSP 7 :
       Its magnitude varied greatly, between +9.5 and +3.0, in an irregular slow pattern.

About AMS 2 :
       Seemed steady at mag +7 at first but suddenly flared to mag +5. Did not follow it
       to see if it was a unique event or part of a known flashing pattern. Anyone knows ?

TiPS was once again negative obs -45 sec/+2.7 min. I'm not lucky with this one.

Regarding my WIRE observation. I took the time to audio tape my observation and
this time a pattern very similar to Jim Varney's emerged for the end of the pass. The
following comments were taken from his March 6 report :
>it had a FF__FF character; as it approached the zenith and went into the
>south the flash pattern was ffff of unequal brightnesses.  Some flashes
>were quite bright, maybe 3rd mag and visible with naked eye.  One flash was
>a real zinger in binocs, maybe 1st or 2nd mag, in the south at approx 70
>deg altitude.
I witnessed exactely the same ffff pattern at the south end of the pass and the same
mag +2 flash (seen naked eyed) at an altitude of about 60 to 65°. The flashing
pattern consisted of 4 flashes at every 0.46 second at mag +4,+5,+7,+8 approx.
Each cycle repeated itself every 1.85 sec based on 8 cycles. Would it mean a 32 rpm
rotation rate ??? I didn't see the first half of that 85° elevation pass even if I looked for
it. The flash timing took place at an azimuth of 190° and elevation from 30 to 18°.
Sun was 12 degrees below the horizon. Mag +2 flash time was 23:47:59 UTC (March 8).

Cheers !

Dan

--
Daniel Deak
St-Bonaventure, Québec

COSPAR site 1745 : 45.9483°N, 72.6539°W, 58 m., UTC-5:00

E-mail : dan.deak@sympatico.ca
French language satellite web site : http://www3.sympatico.ca/dan.deak/