The frequent abbreviations for TLE vaalues are not documented everywhere, but you can read about them at https://www.space-track.org/documentation#/tle http://satobs.org/element.html Your choice of MA = Mean Anomaly is excellent, because it specifies how many 1/360 of the (anomalistic) period the satellite has travelled since the last perigee Before elset Epoch. Thus it is a linear measurement of time - if you increase it by 40 degrees for a 99 min period satellite, it will be predicted to arrive 11 minutes earlier. MM = Mean Motion is the number of (anomalistic) periods/day, ie the period is about 1440/MM A large KeyHole maneuvre has in the past been a decrease by about 0.12. These elsets differ by only -0.01 in MM, which results in +18 min, since the elset is now 18 days old (and period is <=100 min) It will also cause increments in the ENTIRE orbit by about 25 km ! Try them ! /Björn PS I wish I could participate with actual search, but we have now a blue sky even at true midnight. I might search for IGS 8 objects for another two weeks, if we have a clear night. But USA 129 is MUCH too early ! DS 2014-05-12 15:47 GMT+02:00 Derek C Breit <breit_ideas_at_poyntsource.com>: > Please be more specific.. MM?? What’s that?? > > > > And what increments are we talking about.. > > > > I don’t even know the name of the number I was changing, but I bet it is > the ascending node, which is just about the only number in an elset I > understand without direction, except date, and revolutions per day.. > > > > :-)) > > > > Derek > > > > PS.. Currently my next day that I could observe is tomorrow Night, but > more likely the weekend.. Maybe Kevin will find it “accidently” (*cough*) > and then I could hammer it into submission.. :-)) > > > ------------------------------ > > *From:* Björn Gimle [mailto:bjorn.gimle_at_gmail.com] > *Sent:* Monday, May 12, 2014 2:38 AM > *To:* Derek C Breit > *Cc:* Seesat List > *Subject:* 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; > > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > > > > > -- > > ---------------------------------------- > Björn Gimle, COSPAR 5919 > 59.2617 N, 18.6169 E, 51 m > Phone: +46 (0)8 571 43 312 > Mobile: +46 (0) 704 385 486 > ------------------------------ > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2014.0.4577 / Virus Database: 3931/7470 - Release Date: 05/10/14 > -- ---------------------------------------- Björn Gimle, COSPAR 5919 59.2617 N, 18.6169 E, 51 m Phone: +46 (0)8 571 43 312 Mobile: +46 (0) 704 385 486 _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Mon May 12 2014 - 13:55:30 UTC
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