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From: "Juan Palacio"
To: "Claudine Thomas" ,
"Jim Ray (USNO)"
Subject: IGS/BIPM PILOT PROJECT
Date: Thu, 19 Feb 1998 11:17:42 +0100
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Status: RO
----------------------------------------------------------------
Response to CALL FOR PARTICIPATION in an
IGS/BIPM PILOT PROJECT TO STUDY ACCURATE TIME AND FREQUENCY
COMPARISONS USING GPS PHASE AND CODE MEASUREMENTS
Agency or group: Real Instituto y Observatorio de la Armada
Contact person(s): Juan Palacio
E-mail address(es): jpalacio@roa.es
Areas of participation:
1) Deployment of GPS receivers: Yes
2) GPS data analysis: Yes
3) Analysis of instrumental delays: Yes
4) Time transfer comparisons: Yes
6) Other: (please list)
Limitations on participation: (please list any restrictions)
Comments or suggestions:
*********************************************************
Juan Palacio Rodriguez
Jefe de Seccion de Hora
Real Instituto y Observatorio de la Armada
Telf: +34 56 599 286
Fax.: +34 56 599 366
jpalacio@roa.es
*********************************************************
From dey@herschel.usno.navy.mil Fri May 22 07:00 EDT 1998
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From: James DeYoung
Message-Id: <199805221100.MAA18768@herschel.usno.navy.mil>
Subject: RE: ROA TWSTT status (FWD)
To: jimr@Maia.usno.navy.mil
Date: Fri, 22 May 1998 12:00:43 GMT
Cc: dey@herschel.usno.navy.mil
X-Mailer: Elm [revision: 212.4]
Status: RO
Here is the response from Juan Palacio at ROA on the status of his TWSTT and
GPS CP. FYI.
>
>
> Hi, Jim:
>
> Thank you very much for your congratulations. We have last two years to
> get our station but we already have got it.
>
>
> > I am trying to find IGS stations that have GPS CP receivers and TWSTT
> stations
> > for comparision between the two methods. I noticed ROA has an IGS
> > station. So my question is mainly that status of your TWSTT work and
> > if the ROA IGS clock could be used for a TWSTT station so we would have
> > a common time/frequency reference.
> >
> > Do you have any Hydrogen maser clocks?
> > Cesiums?
>
> We have Caesium, two HP 5071 A high performance. This is the clock we use
> for the IGS station and for the TWSTT (when we'd get INTELSAT approvement).
> We also have two TTR-4Ps that may be more suitable to do the work you
> propose, because IGS station receiver is a Trimble that only receive
> frequency from us, it use it internal clock; on the other hand TTR-4P use
> UTC(ROA) as 1PPS input.
>
> > Do you have an earth station yet? If not will you and when?
>
> I have got an earth station. It is composed by a 1.8 , Prodelin 1194-900
> antenna and a KSTAR SSE Technologies transmiter-receiver. It is ready to
> operate but I am not allowed to do that because the station has not been
> approved, by now. I will be approved in a few days to transmit to HISPASAT
> to do some ranging experiments. I will probably use this approvement to be
> presented to INTELSAT.
>
> > Do you have a modem? MITREX or SATRE or AOA? If not will you and when?
>
> I have a TWSTT SATRE modem from TimeTech GmbH. It has been checked and
> callibrated, and is OK
>
>
> > Do you plan to join the inter-European and transatlantic TWSTT
> experiments?
> > If so when?
>
> The fact is that my antenna is now pointing to Intelsat 706 and I have
> been receiving your, NIST and al European participants signals during some
> days to do some checks: antenna alingment, station frequencies, modem
> frecuencies, control computer ..and so on. As I have no funds to join the
> experience for this year, I am now involved in an experience with HISPASAT,
> trying to convince them about the benefits they can get from Time Community
> to locate their satellites, if they provide us free satellite time for
> TWSTT. I think it could be interesting for TWSTT people to increase the
> number of daily!!! comparisons.
>
> >
> > We would be very interested in your participation in TWSTT to be one of
> > the few where we can compare GPS CP and TWSTT.
>
> Me too; as you know, I am doing some works with GPS CP and we will
> participate in the next IGS-BIPM campaing, and all that sound to increase
> experience and knowledge on these fileds will be wellcomed by me.
>
>
> >
> > I look forward to you response.
>
> Well, I think I have done this soon..;-)
>
> Best regard,
>
>
> Juan
> *********************************************************
> Juan Palacio Rodriguez
> Jefe de Seccion de Hora
> Real Instituto y Observatorio de la Armada
> Telf: +34 956 599 286
> Fax.: +34 956 599 366
> jpalacio@roa.es
> *********************************************************
>
>
--
James A. DeYoung (TST) U. S. Naval Observatory
(202) 762-0290 FAX (202) 762-1511 3450 Massachusetts Avenue NW
dey@herschel.usno.navy.mil Washington DC 20392-5420