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REVOSAT
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14 mars 2007

Resonance 16 periods and crash of COSMOS 1025

Resonance 16 periods and crash of COSMOS 1025
c1025_decayingc1025_last_revc1025_resonance From photos jan 2006, we determined the diagram of zenital visibility of cosmos 1025 till the beginning of march 2007 to see eventually its decay because its height was very low. We computed that its last ascending...
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14 avril 2007

How to identify WEAK satellite tracks on photos

How to identify WEAK satellite tracks on photos
metop_abrixasmetop_a_and_abrixas_traces Sometimes we got weak or short track lines on photos and the chopping of the line enabling to get the time elapsed is hardly perceptible. See photo here after(Canes venatici CVN) and ground track on 5 April 07,...
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14 juillet 2007

SEASAT 1 ALWAYS MAJESTUOUS

SEASAT 1 ALWAYS MAJESTUOUS
seasat_majestic seasat_1_always_majestuous Since its launch , its altitude decreased from 800 kms on 1978 to 750kms on 2007 so it became brighter every year. Its transit seems to be that of a mere heliosynchronous(98°) one but the computer gives with...
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7 février 2008

ABOUT USA 193-

ABOUT USA 193-
march_revosatspell_visibility_USA_193 march_revosatABOUT_USA_193 march_revosat_perigee_de_USA_193 We got photos of that satellite on 30 October 2007.19h18(1). Then we computed orbital elements with fast Kepler soft. and drew the last two spells of visibility...
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14 mai 2007

METOP-A FLARING AND KEYHOLE USA 129

METOP-A FLARING AND KEYHOLE USA 129
tableau__precession These two satellites are heliosynchronous and the time of their trajectory zenithal ascending transit ZAT are at present quasi the same.22H45(2).So regularly they transit together see photo with Metop-A flaring and USA 129 mag4.4 on...
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14 juin 2007

Resurs 1-4 rocket and Envisat

Resurs 1-4 rocket and Envisat
recap_sat_2006_2007resurs_1_4_and_envisat tableau__precession On this spring, the precession of this satellite had been –23mn/year, function of its altitude, inclination and excentricity. Its RA of ascending node (RAAN) had been the same that of Envisat...
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7 avril 2003

How to observe satellites

How to observe satellites
Today, with using REVOSAT’s software it is easy to know the decreasing height of the station, then the increasing height by the boosting of the shuttle or supply vehicle.But also after the departure of the shuttles from the Cape Canaveral, their passage...
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14 août 2007

VISIBILITIES OF AUREOLE 2 ROCKET

VISIBILITIES OF AUREOLE 2 ROCKET
visibility_of_aureole_2_rocketdiag_aureole2_roc Aureole 2 rocket is the more visible of series Aureole. Its orbit is very elliptic 364*987 Kms*74°(ESA-NASA) so its visibility is function of the shift of the ascending node and also the rotation of perigee....
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2 avril 2008

PRECESSION OF ATV AND ISS BEFORE DOCKING

PRECESSION OF ATV AND ISS BEFORE DOCKING
revosat_mai_PRECESSION_OF_ATV_AND_ISS__BEFORE_DOCKINGrevosat_maiDocking_ATV During march ATV jules Verne(ESA) has been launched to be docked to ISS. (Inclination 51.6°)See photo of ISS. The dashed trajectory on the photo allowed to get the time elapsed...
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7 septembre 2007

ABOUT USA 129

about_usa_129 chute_du_perigee_usa_129 passage_usa_129 usa129_polaires We saw that spy satellite only when it is near the perigee because when apart, it is too high (See Revosat on 31 may 07).So we drew the visibility diagram with the argument of perigee...
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7 octobre 2007

AUREOLE-2 rocket

aureole_resonances polaire_aureole_2 resonance_nr_np_aureole resume_aureole tab_complet_resonance On the beginning of 2007, we studied the predictions of transits of aureole-2 roc. By now we computed the height versus anomaly and the main resonance 15/1...
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7 janvier 2008

INCLINATION OF THE GROUND TRACK OF A SATELLITE VERSUS LATITUDE

revosatjanvierinclination_of_iridium revosatjanvieriridium_pente_au_sol_versus_latitude The inclination of the trajectory of a satellite in the sky is sometimes quite different from that we expect, considering (i) inclination of the orbit. Two cases.I)Quasi...
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1 juin 2008

Summary of 2005-2008 Revosat activity

Revosat_june_recap_sat_2006_2008Revosat_june_Summary_2005_2008_REVO Revosat has gathered all the photographied satellites over AUFFARGIS (France).With these photos, their trajectories have been determined ie height, inclination orbit, ascending node.We...
Posté par revosat à 23:24 - Commentaires […] - Permalien [#]

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7 mai 2008

THE LAST REVOLUTIONS OF USA 193

pres_avril_polaires_de_USA_193 pres_avril_THE_LAST_REVOLUTIONS_OF_USA_193 pres_avril_USA_193_Honolulu On march 2008, we computed the spells of visibility and the unusual movement of perigee of USA 193(the argument of perigee had been kept ~100° to destroy...
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7 mars 2008

INCLINATION OF THE TRACK OF MOLNIYA TYPICAL AND MOLNIYA-1_11474

fevrier_I_and_dI_OF_MOLNIYA_TYPICAL_and_11474 fevrier_Moniya_1_11474inclination_caract fevrier_Moniya_typical_inclination_caracteristique The elements of Molniya typical are 40000kms*500kms*63.4°.Those of 11474 15642*433*62.7°. Molniya typical is very...
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7 juin 2008

List of Satellite observed

COROT SOYOUZ METEOR 1-7 OKEAN O rocket GENESIS 1 COSMOS 807, 1025, 1220... UARS HELIOS 1A Rocket IRIDIUM 30 ABRIXAS SEASAT 1 TOPEX-POSEIDON TERRA (NASA environment) ISS ROSAT ARIANE V LACROSSE 2, 3, 4, 5... MOLNIYA ROSETTA ENVISAT Shuttle ENDEAVOUR STS...
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7 novembre 2007

ABOUT MOLNIYA-3

about_molniyaprec_molniyarho_theta_molniya_3 The elements of typical Molniya are 40000/500 kms/63.4°.Such elements give a semi major axis A=(40000+500)/2+6378=26628kmsC=26628-(6378+500)=19750 kmsExcentricity=C/A=19750/26628=.7417Period T=26628^1.5/6028.9/60...
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8 mars 2009

BOOK : "Chasseurs de satellites"

L'ensemble du site a été retraduit en français et fait l'objet d'un livre intitulé "chasseurs de satellites" Droits réservés ISBN 978-2-7466-0651-7 Pour les commandes s'adresser à : Guy LAFFAY 15 rue de la Toucharderie 78610 AUFFARGIS France TEL : +33...
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