| Date: | 2008-09-29 15:01:00 | |
| Sender: | Morio Toyoshima <> Carey Noll <carey.noll@nasa.gov>> | |
| Subject: | [SLR-Mail] No. 1717: OICETS Request for laser tracking Oct 08 -Feb09 | |
| Author: | Morio Toyoshima | |
| Content: | ******************************************************************************** SLR Electronic Mail 2008-09-29 15:01:00 UTC Message No. 1717 ******************************************************************************** Author: Morio Toyoshima Subject: OICETS Request for laser tracking Oct 08 -Feb09 Dear SLR specialists, NICT and JAXA will conduct the lase communication experimets with OICETS=20 from October 1, 2008 to February 28, 2009. The aim of this campaign is=20 to test a new tracking system for optical communications and perform a=20 forward error correction experiment using LDPC code via ground-to-OICETS=20 laser communication links. The satellite laser ranging network and the=20 satellite laser communication can be unified in the future and pursue=20 the scientific and engineering objectives, which becomes their new=20 expansion to the future global satellite optical navigation and=20 communications network. Please support our experiments from the SLR=20 sperialists.=20 Please set the Normal Bin Size as 30 seconds. The orbital altitude of OICETS is 610km and the inclination is 97.83 deg. The CPF file will be updated at every Monday and Wednesday. =20 The optical communication experiments will be performed on Tuesday and Thur= sday. Because of the optical communication experiments, please do not perform=20 any laser ranging during 15:00-18:00 UTC on Tuesday and Thursday. =20 We very much appreciate for all your kind supports from all the stations. = =20 The contact point of this experiment is: Morio Toyoshima, E-mail: morio@nict.go.jp Space Comm. Group, New Generation Wireless Comm. Res. Center National Institute of Information and Communications Technology (NICT) TEL:+81-42-327-5825, FAX:+81-42-327-6825 Thank you very much for your kind support in advance. =20 Best regards, Morio >-------- Original Message -------- >Subject: Fwd: OICETS Request for laser tracking Oct 08 -Feb09 >Date: Thu, 25 Sep 2008 11:28:40 -0400 >From: Carey Noll >To: ILRSsta ILRSsta >CC: cb-list@cddis.gsfc.nasa.gov >References: <200809101711.JDC17645.PNSJP@nict.go.jp> > >To: ILRS Station Contacts > >Dear Colleagues, > > The ILRS Governing Board has approved the NICT request to conduct >a laser ranging campaign on OICETS. The campaign runs from October >2008 through February 2009. We ask that the stations in the ILRS network >make their best effort to track the satellite during this time. The >priority for OICETS will be set to after Jason-1 and -2. JAXA will >begin supplying predictions in the next few days. Thank you for your >efforts to support tracking of the OICETS satellite once again. > >Regards, >Carey. >----- >Begin forwarded message: > >> From: ”Toyoshima, Morio” >> Date: September 10, 2008 4:11:52 AM EDT >> To: GAPP@nerc.ac.uk >> Cc: mpearlman@cfa.harvard.edu, Carey.E.Noll@nasa.gov, t.otsubo@srv.cc.hi= t-u.ac.jp=20 >> , takayama@nict.go.jp, kuni@nict.go.jp >> Subject: Re: OICETS Request for laser tracking Oct 08 -Feb09 >> Reply-To: morio@nict.go.jp >> >> Dear Dr. Graham Appleby, >> >> Thank you very much for your prompt reply. My name is Morio Toyoshima >> and I am an optical communications engineer and work with Kunimori-san >> in NICT. We will start again the laser communications experiment with >> OICETS. We want to test a new tracking system for optical =20 >> communications >> and perform a forward error correction experiment using LDPC code via >> ground-to-OICETS laser communication links. The satellite laser =20 >> ranging >> network and the satellite laser communication can be unified in the >> future and pursue the scientific and engineering objectives, which >> becomes their new expansion to the future global satellite optical >> communications network. >> >> In the last experiments in 2006, JAXA performed the satellite ranging >> every day and the orbital position error was around a few hundred >> meters. The beam divergence of the transmitting communication laser >> in our optical ground station is around 200 urad, which corresponds to >> around 200 m at 1000 km distance. In this second stage of the >> experiment, however, JAXA will perform the satellite ranging once a >> week before the middle of October, and twice a week after that. >> Therefore, the accuracy of the orbital prediction will not be better >> than before. We will test a much narrower laser beam (around 1/10) >> with the new tracking system including a fine steering mirror as well. >> That´s why we request the precise laser ranging of the OICETS =20 >> satellite >> to the ILRS Missions Working Group. >> >> JAXA can provide the CPF file during the experiment and we hope that >> the orbital elements will be improved by SLR. Please let me know >> whether the ILRS Missions Working Group can accept our request and >> we hope that we can perform the experiment with the support of the >> ILRS Missions Working Group. We really appreciate the help of the >> ILRS MWG in advance. Thank you very much. >> >> Sincerely yours, >> >> Morio >> >> >> In message ”OICETS Request for laser tracking Oct 08 -Feb09” >> ””Graham Appleby” >> at ”Tue, 09 Sep 2008 01:55:48 +0100”: >> >>> Dear Dr Morio Toyoshima >>> >>> On behalf of the ILRS Missions Working Group I have passed your =20 >>> request to >> the Group for assessment prior to making a recommendation to the =20 >> Governing >> Board. >>> >>> However, before making a decision, members of the Group would like =20 >>> from you >> a little more detail about your use of the laser data - we assume =20 >> that the >> mission will need Precise Orbit Determination provided by SLR, but =20 >> please >> could you confirm this and add any more detail that you may have. >>> >>> With best regards, >>> >>> Graham Appleby >>> MWG coordinator. >>> >>> >>> Dr Graham Appleby >>> NERC Space Geodesy Facility >>> Monks Wood/Herstmonceux >>> 01487 772477 / 01323 833888 >>> http://nercslr.nmt.ac.uk >>> >>> >>> The information contained in this e-mail may be subject to public =20 >>> disclosure >> under the Freedom of Information Act 2000. Unless the information is =20 >> legally >> exempt from disclosure, the confidentiality of this e-mail and your =20 >> reply >> cannot be guaranteed. >>> >>> >>> >>> --=20 >>> This message (and any attachments) is for the recipient only. NERC >>> is subject to the Freedom of Information Act 2000 and the contents >>> of this email and any reply you make may be disclosed by NERC unless >>> it is exempt from release under the Act. Any material supplied to >>> NERC may be stored in an electronic records management system. >>> >>> >> >> >> --- Toyoshima Morio, Ph.D. (mailto:morio@nict.go.jp) >> --- Space Comm. Group, New Generation Wireless Comm. Res. Center >> --- National Institute of Information and Communications Technology >> --- TEL:+81-42-327-5825, FAX:+81-42-327-6825, http://www.nict.go.jp >> > >----- >Ms. Carey Noll >Manager, Crustal Dynamics Data Information System (CDDIS) >Secretary, ILRS Central Bureau >NASA GSFC >Code 690 >Greenbelt, MD 20771 >USA > >E-mail: Carey.Noll@nasa.gov >Voice: (301) 614-6542 >Fax: (301) 614-6015 >WWW: http://cddis.gsfc.nasa.gov > > > > >--=20 > -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > Shinichi Nakamura > Japan Aerospace Exploration Agency(JAXA) > Precise Orbit Determination Team > Flight Dynamics Division > tel +81-29-868-2625 fax +81-29-868-2990 > JAXA Homepage http://www.jaxa.jp > JAXA SLR Homepage http://god.tksc.jaxa.jp > -*-*- =B5=DE=CD=D1=B0=CA=B3=B0=A4=CF=A5=E1=A1=BC=A5=EB=CF=A2=CD=ED=A4=CB= =A4=B7=A4=C6=A4=AF=A4=C0=A4=B5=A4=A4 -*-*- > > --- Toyoshima Morio, Ph.D. (mailto:morio@nict.go.jp) --- Space Comm. Group, New Generation Wireless Comm. Res. Center --- National Institute of Information and Communications Technology --- TEL:+81-42-327-5825, FAX:+81-42-327-6825, http://www.nict.go.jp ---1149172827-380248081-1222693243=:5792-- From: slrmail@dgfi3.dgfi.badw-muenchen.de ******************************************************************************** |