Re: Optical tracking De-Orbit Sail

From: Robert Holdsworth via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 26 Jun 2018 10:24:04 +1200
As I suspected might happen launch is postponed to 27 June at the same
time owing to weather.

Robert
On Mon, 25 Jun 2018 at 04:31, Jon . via Seesat-l <seesat-l_at_satobs.org> wrote:
>
> Using Dr. Kelso's elset, this is the derived elset for payloads and the
> Curie kick stage, asuming launch jun. 26 at 00:30:00 UTC:
>
> ELECTRON-IBT search                                      490 X 508 km
> 1 70000U 18500A   18177.09468750 0.00023591  00000-0  10608-2 0    04
> 2 70000  84.9992 277.5361 0013516 288.0032 306.9608 15.21097829    06
>
>
> Jon.
>
> 2018-06-24 14:26 GMT+02:00 Robert Holdsworth via Seesat-l <
> seesat-l_at_satobs.org>:
>
> > Following abort owing to issues with a tracking station, launch is now set
> > for no earlier than 0030 UTC on Tuesday 26 June.
> > However the forecast for the launch area is for a strong wind change at
> > about that time.
> > Robert
> >
> > On Sat, 23 Jun 2018, 12:54 Robert Holdsworth <robbonz_at_gmail.com> wrote:
> >
> > > Now NET 0227 UTC.
> > >
> > > On Sat, 23 Jun 2018, 09:33 Robert Holdsworth <robbonz_at_gmail.com> wrote:
> > >
> > >> 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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>
> --
> Jon, COSPAR 6242, 42.9453, -2.82839, 623m, Bitoriano, Basque Country.
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Received on Mon Jun 25 2018 - 17:25:21 UTC

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