Based on the sail deployment time/state vector provided in the spreadsheet, I obtain the following TLE fit: 22 Jun 2018 08:55:48 Satellite-NABEO Reference Trajectory Sampling ----------------------------- Start Time (UTCG) Stop Time (UTCG) Time Step (sec) ------------------------ ------------------------ --------------- 23 Jun 2018 02:13:21.000 24 Jun 2018 02:13:21.000 300.000 Fit Summary ----------- Initial RMS (km) Final RMS (km) Iterations # of Obs ---------------- -------------- ---------- -------- 2.112101 0.348057 2 289 Two Line Element Set -------------------- 1 99999C 18174.09260417 .00023585 00000-0 10608-2 0 00008 2 99999 084.9992 273.8258 0013516 288.0032 306.9608 15.21097829000019 Note that I do not have any data for area-to-mass or attitude, so this TLE would not be expected to be a good fit for very long after the deployment. It also assumes a nominal launch/deployment. - TS Dr. T.S. Kelso CelesTrak, https://celestrak.com E-Mail: ts.kelso_at_celestrak.com<mailto:ts.kelso_at_celestrak.com> On 2018 Jun 22, at 08:45, Robert Holdsworth via Seesat-l <SeeSat-L_at_satobs.org<mailto:SeeSat-L_at_satobs.org>> wrote: It should be noted that the time given is the opening of the launch window which extends to 0430 UTC. Launch broadcast at http://www.rocketlabusa.com/live-stream Weather forecast looks good for launch, fine with some wind but probably not enough that high altitude winds will be an issue. Robert On Sat, 23 Jun 2018, 06:25 Derek C Breit via Seesat-l <seesat-l_at_satobs.org<mailto:seesat-l_at_satobs.org>> wrote: I would attempt this given a TLE Search set if visibility is possible from the SF Bay Area, CA.. Derek -----Original Message----- From: Seesat-l [mailto:seesat-l-bounces+breit_ideas= poyntsource.com_at_satobs.org<mailto:poyntsource.com_at_satobs.org>] On Behalf Of Dr. T.S. Kelso via Seesat-l Sent: Friday, June 22, 2018 10:24 AM To: Seesat List Subject: Fwd: Optical tracking De-Orbit Sail Please see the message below regarding a request for optical tracking of today’s planned Electron launch with NABEO. - TS Dr. T.S. Kelso CelesTrak, https://celestrak.com E-Mail: ts.kelso_at_celestrak.com<mailto:ts.kelso_at_celestrak.com><mailto:ts.kelso_at_celestrak.com> Begin forwarded message: From: Thomas Sinn <sinn_at_hps-gmbh.com<mailto:sinn_at_hps-gmbh.com><mailto:sinn_at_hps-gmbh.com>> Subject: Optical tracking De-Orbit Sail Date: 2018 June 22 at 01:38:55 HST To: "TS.Kelso_at_celestrak.com<mailto:TS.Kelso_at_celestrak.com><mailto:TS.Kelso_at_celestrak.com>" < TS.Kelso_at_celestrak.com<mailto:TS.Kelso_at_celestrak.com><mailto:TS.Kelso_at_celestrak.com>> Cc: "Langer, Martin" <martin.langer_at_tum.de<mailto:martin.langer_at_tum.de><mailto:martin.langer_at_tum.de>> Dear Mr. Kelso, I got your email address from martin Langer of the Technical University of Munich as we are having a joint project on a dragsail technology demonstrator that will be launched tomorrow morning with the Electron 3 rocket of Rocket Lab. We should get downlink data of the sail deployment but is a risk that the aluminium coated foil blocks the signal of the antenna. Therefore we came up with the idea to maybe try to see if someone in the amateur astronomy community would like to give it a try to get a picture of the sail (2.5m2 sail area in a 500km orbit) from the ground once the dragsail is deployed (1.5hr after launch (launch currently scheduled at 0:30 UTC on the 23rd of June). More infos to the sail (NABEO): www.hps-gmbh.com/ADEO<http://www.hps-gmbh.com/ADEO>/< http://www.hps-gmbh.com/ADEO/> Please find attached the state vector for the deployment (according to the current launch time (TBD)). We though maybe you have someone in mind that would be interested to try to get a nice picture of the kick-stage with the dragsail once its orbiting the earth. Kind regards, Thomas --------------------------- Dr. Thomas Sinn Deployable Structures: Project Manager & System Engineer HPS GmbH Hofmannstr. 25-27 81379 München Germany phone: +49 89 452057672 fax: +49 89 452057699 sinn_at_hps-gmbh.com<mailto:sinn_at_hps-gmbh.com><mailto:sinn_at_hps-gmbh.com> http://www.hps-gmbh.com CEO: Dr.-Ing. Ernst K. Pfeiffer CFO: Dipl.-Ing. Peter Rauhut HRB 185249, AG München --------------------------- _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l --- This email has been checked for viruses by AVG. https://www.avg.com _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Jun 22 2018 - 14:01:50 UTC
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