[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Unisat 2 information

Looks like UHF up and VHF down. Anyone know the frequencies?

Info below was translated by Babelfish from:

  a.. Geometry : prisma to octagonal base of side 15cm and height 25cm - Mass :
12 kg
  a.. The structure is to modulate with 5 horizontal slabs in honeycomb Al/Al in
order to lodge the various subsystems, supports on four vertical columns
carrying - the lateral surface is constituted from 8 panels in honeycomb on
which the solar paddles come rolled steels. Part of such panels instead is
allotted in order to accommodate the payload
  a.. The power system is based on solar cells to the silicon, assembled with
land technology opportunely modified in order to resist to the environmental
conditions them orbital - the generated maximum power from the 11 modules is of
approximately 15W and the orbital medium power is equal approximately to 8W - 2
buses of feeding (regulated to 5V, not regulated to 12 V) for the feeding of the
various subsystems - 2 arrange of accumulation of the energy: traditional cells
NiCd and cells experience them to Ionian of Lithium (with relationship
energia/massa approximately double quantity regarding the NiCd technology)
  a.. Telecommunicationses in band UHF (uplink) and VHF (downlink) -
transmissions in frequency modulation to 9600 bps - modem fax integrated ST
75C540 - receiving antenna omnidirettiva - 1 arranges of antennas to quadrupolo
( l /4)
  a.. Telemetry previewed for all the main functions of the satellite: in
particular they will come monitorate the conditions of the solar paddles and the
temperatures of the packages batteries and the microprocessore
  a.. Computer of edge : Atmel T89C51 (family 80C51)
  a.. Determination of order through two magnetometri of different technology,
earth sensor in optical band and direction of the sun calculated from the
measures supplied from the solar paddles
  a.. Control of order : the microsatellite is stabilized for spin (5 rpm) with
active magnetic control for the guideline of the axis of spin by means of three
  a.. Payload previewed : some technological payloads (battarie to Ionian of
Lithium, solar cells, Sun sensors, Earth sensors); it arranges of sensors for
the location of impacts with microdetritus; spectrometer for the aerosol survey;
television camera in the visible one; experiment of micropropulsion
  a.. Presumed orbit circular to a quota 650 km and inclination of 65° (must be
ciìonfermata from part of the responsibles of the launcher)
  a.. Earth station for the control of the mission realized and already
operating near the center of Saint Peter in Ties of the School of Aerospace
Engineering (SPIV)
  a.. The launch is previewed for the period 15 August 2002 - 15 December 2002
from the cosmodromo of Baikonur (Kazakhstan). The carrier is the rocket
Russian-ucraino DNEPR, with which it has been already launch UNISAT

Don Woodward
AMSAT 33535

Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org