Re: DCB Obs MAY 11th UT - DMSP F18, USA 186, USA 179r, Lacrosse 5, USA 129 Planar Search

It's the method I usually use.
A drawback is that it only compensates for time.
Your obs field is far from perigee , so if apogeehas been increased (or
decreased!) the off-zenithal passes might be outside your FOV.
If the TLE is old, and the error is mainly because of drag, usually change
the Bstar (35722-3) instead.

But here it should be a maneuvre, and you might simulate it partly by
changing MM
A LARGE KH MM change can be down to -0.13 or so, which would cover up to
TWO orbits ! That would allow you to get a feeling of possible track
offsets.

/Björn


2014-05-11 21:39 GMT+02:00 Derek C Breit via Seesat-l <seesat-l_at_satobs.org>:

>
>
>
> EQUIPMENT-
> Orion ST80 with Mogg 0.6 FR and a Mintron integrating camera. ST80 is
> piggybacked on a 12" LX200 which does the slewing and tracking. Focal
> Reducer is at max distance from detector and still capable of focus.
> FOV - 1.98 x 1.48 Degrees
> Time by IOTA-VTI GPS Time inserter (from VideoTimers)
>
> Equipment Notes - Luminance only is recorded to video.
>
> >>THIS IS THE WIDEFIELD SETUP - Watec 902H2 Ultimate w/ 50mm Camera lense
>
>
> For CLASSIFIED
>
> 35951 09 057A   8739 G 20140511034118910 26 25 1007870+113982 37
> 35951 09 057A   8739 G 20140511034122680 26 25 1006489+132652 37
>
> 28888 05 042A   8739 G 20140511040457707 26 25 1226842-243045 37 S+027 03
> 28888 05 042A   8739 G 20140511040554699 26 25 1222531+051831 37
> 28888 05 042A   8739 G 20140511040614853 26 25 1220294+262102 37
> 28888 05 042A   8739 G 20140511040639629 26 25 1215424+570196 37
> 28888 05 042A   8739 G 20140511040656330 26 25 1206179+743403 37
>
> 28385 04 034B   8739 G 20140511043714705 26 25 1438294-010591 37
> 28385 04 034B   8739 G 20140511043740632 26 25 1441402+003750 37
> 28385 04 034B   8739 G 20140511043755981 26 25 1443403+014053 37
>
> 28646 05 016A   8739 G 20140511053149215 26 25 0601122+435046 37
> 28646 05 016A   8739 G 20140511053249711 26 25 0656731+453566 37
> 28646 05 016A   8739 G 20140511053427245 26 25 0935500+394253 37
> 28646 05 016A   8739 G 20140511053451870 26 25 1025026+340126 37
> 28646 05 016A   8739 G 20140511053541922 26 25 1156480+165379 37
> 28646 05 016A   8739 G 20140511053550230 26 25 1209252+134228 37
>
>
>
>
> Obs - Pred: 0.557 deg X-track; 0.066 s early, relative 11.05 day old elset:
> Obs - Pred: 0.303 deg X-track; 0.473 s early, relative 11.05 day old elset:
>
> Obs - Pred: 0.071 deg X-track; 2.261 s early, relative 5.04 day old elset:
> Obs - Pred: 0.059 deg X-track; 2.149 s early, relative 5.05 day old elset:
> Obs - Pred: 0.056 deg X-track; 2.168 s early, relative 5.05 day old elset:
> Obs - Pred: 0.068 deg X-track; 2.180 s early, relative 5.05 day old elset:
> Obs - Pred: 0.131 deg X-track; 2.336 s early, relative 5.05 day old elset:
>
> Obs - Pred: 0.077 deg X-track; 18.916 s early, relative 7.02 day old elset:
> Obs - Pred: 0.001 deg X-track; 19.730 s early, relative 7.02 day old elset:
> Obs - Pred: 0.031 deg X-track; 21.109 s early, relative 7.02 day old elset:
>
> Obs - Pred: 0.026 deg X-track; 0.409 s early, relative 7.38 day old elset:
> Obs - Pred: 0.037 deg X-track; 0.223 s early, relative 7.38 day old elset:
> Obs - Pred: 0.065 deg X-track; 0.193 s early, relative 7.38 day old elset:
> Obs - Pred: 0.079 deg X-track; 0.023 s early, relative 7.38 day old elset:
> Obs - Pred: 0.142 deg X-track; 0.070 s late, relative 7.38 day old elset:
> Obs - Pred: 0.090 deg X-track; 0.047 s late, relative 7.38 day old elset:
>
>
> NOTES-
>
> PLANAR SEARCH FOR USA 129..
> I did *MOST* of a search for USA 129 and did not find it. Everything seen
> was matched.. (I did catch USA 179r by "accident".. Only
> the second time I have caught a classified object accidently.. Yeah!")
>
> First Planar Search I have attempted.. Using the current Classified elset,
> I edited this number.. 127.2344 in 10.0 increments.. I
> covered roughly that number plus 180 to minus 60.. 2/3's of the search..
>
> If this method is correct, then it is not in the part I covered ( 5x7 deg
> FOV to mag 8) and someone should look to the parts I
> didn't cover i.e. "Late" vs. the current elset.. If this isn't correct,
> well..
>
>
> Big Flares from USA 186.. Video forthcoming..
>
>
> Derek
>
> Derek C Breit
> BREIT IDEAS Obs - Morgan Hill, CA - COSPAR 8739
> E. Longitude -121 42 10.0, Latitude 37 6 47.8, Alt. 282m;
>
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> Seesat-l mailing list
> http://mailman.satobs.org/mailman/listinfo/seesat-l
>



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----------------------------------------
Björn Gimle, COSPAR 5919
59.2617 N, 18.6169 E, 51 m
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