Re: Optical tracking De-Orbit Sail

From: Robert Holdsworth via Seesat-l <seesat-l_at_satobs.org>
Date: Sat, 23 Jun 2018 09:33:21 +1200
Rocketlab has now posted it is targeting launch no earlier earlier than
0050 UTC.
Robert

On Sat, 23 Jun 2018, 07:01 Dr. T.S. Kelso via Seesat-l <seesat-l_at_satobs.org>
wrote:

> 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
> ---------------------------
>
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Received on Fri Jun 22 2018 - 16:34:17 UTC

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