Dove-OSCAR 17

Dove-OSCAR 17 (a.k.a. DO-17 or Microsat 2) is a Brazilian educational and amateur radio satellite (BRAMSAT) (AMSAT-BRAZIL) launched on 22 January 1990.

This article is about the satellite. For other uses, see Oscar (disambiguation).

Dove-OSCAR 17
Dove-OSCAR 17 satellite (a.k.a. Microsat 2)
NamesOSCAR 17
Microsat 2
DO-17
BRAMSAT
Mission typeEducational, Amateur radio
OperatorBRAMSAT / AMSAT
COSPAR ID1990-005E
SATCAT no.20440
Mission duration8 years (achieved)
Spacecraft properties
BusAMSAT
ManufacturerAMSAT-BRAZIL
Launch mass12.92 kg (28.5 lb)
Dimensions21.3 × 23.0 × 23.0 cm
PowerSolar panels and batteries
Start of mission
Launch date2 January 1990, 01:44:35 UTC
RocketAriane 40 H10 V-35
Launch siteKourou, ELA-2
ContractorArianespace
End of mission
Last contactMarch 1998
Orbital parameters
Reference systemSun-synchronous orbit [1]
RegimeLow Earth orbit
Perigee altitude791 km (492 mi)
Apogee altitude821 km (510 mi)
Inclination98.70°
Period100.80 minutes
 

Project

Dove-OSCAR 17 is one the results of the so-called Microsat project by AMSAT, manufactured in the 1980s by the civil and electric engineer Junior Torres de Castro (amateur radio operator with callsign PY2BJO), who had been developing his ideas since 1957. He has built, with his own resources, the first artificial satellite for educational and humanitarian purposes: the "Dove".

The device, assembled in a garage in Botucatu, São Paulo, was meant to provide synthesised peace messages for educational institutions at a time when the Cold War was still determining international relations around the world. It has a Digital Orbiting Voice Encoder (DOVE), designed to emit the synthesised voice messages, and also telemetry data transmission (FM Packet AFSK 1200 AX.25 at 145.825 MHz). It is box shaped with dimensions of 21.3 × 23.0 × 23.0 cm, with solar panels on the faces of the cube and weights 12.92 kg.[2] The configuration and assembly was at that time designated as "Microsat".[3]

Mission

Dove-OSCAR 17 was launched on 22 January 1990 by an Ariane 4 rocket from Centre Spatial Guyanais (CSG). The payload also included the SPOT-2 and other five OSCAR satellites.[4] According to AMSAT, "due to hardware failures that have occurred since launch, the primary mission of providing voice messages of world peace from DOVE has not been fully realized"[5]

Last stable contact with the satellite officially occurred in March 1998 when it had a battery failure. However, because of the still functional solar panels, when the device is properly aligned to the Sun, it transmits its telemetry data.

See also

References
  1. "Trajectory: OSCAR 17 1990-005E". NASA. 14 May 2020. Retrieved 21 January 2021. This article incorporates text from this source, which is in the public domain.
  2. "DOVE (DOVE-OSCAR 17, DO 17)". =Gunter's Space Page. 24 July 2018. Retrieved 21 January 2021.
  3. Duncan, Courtney (26 September 1989). "A New, Small Satellite Bus Concept (AMSAT-NA)". Courtney Duncan. Retrieved 21 January 2021.
  4. "Display: OSCAR 17 1990-005E". NASA. 14 May 2020. Retrieved 21 January 2021. This article incorporates text from this source, which is in the public domain.
  5. "Spotlight On: The Microsats". AMSAT. Retrieved 11 August 2015.
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