Amateur radio satellite

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Template:Short description Template:Redirect Template:More citations needed Template:Amateur radio An amateur radio satellite is an artificial satellite built and used by amateur radio operators. It forms part of the Amateur-satellite service.[1] These satellites use amateur radio frequency allocations to facilitate communication between amateur radio stations.

Many amateur satellites receive an OSCAR designation, which is an acronym for Orbiting Satellite Carrying Amateur Radio. The designation is assigned by AMSAT, an organization which promotes the development and launch of amateur radio satellites. Because of the prevalence of this designation, amateur radio satellites are often referred to as OSCARs.

These satellites can be used free of charge by licensed amateur radio operators for voice (FM, SSB) and data (AX.25, packet radio, APRS) communications. Currently, over 18 fully operational amateur radio satellites are in orbit.[2] They may be designed to act as repeaters, as linear transponders, and as store and forward digital relays.

Amateur radio satellites have helped advance the science of satellite communications. Contributions include the launch of the first satellite voice transponder (OSCAR 3) and the development of highly advanced digital "store-and-forward" messaging transponder techniques.

The Amateur Radio Satellite community is very active in building satellites and in finding launch opportunities. Lists of functioning satellites need updating regularly, as new satellites are launched and older ones fail. Current information is published by AMSAT. AMSAT has not been actively involved in the launch and operation of most amateur satellites in the last two decades beyond allocating an OSCAR number.

History

OSCAR 1

Template:Main

First amateur radio satellite OSCAR 1, launched in 1961

File:Oscar 2.ogg The first amateur satellite, simply named OSCAR 1, was launched on December 12, 1961, barely four years after the launch of the world's first satellite, Sputnik I. The satellite had to be built in a very specific shape and weight, so it could be used in place of one of the launch vehicle ballast weights. OSCAR 1 was the first satellite to be ejected as a secondary payload (the primary payload was Discoverer 36) and to subsequently enter a separate orbit. It carried no on-board propulsion and its orbit decayed quickly. Despite orbiting for only 22 days, OSCAR 1 was an immediate success and led to follow-on missions. Over 570 amateur radio operators in 28 countries forwarded observations to Project OSCAR.

OSCAR 10

Most of the components for OSCAR 10 were "off the shelf". Jan King led the project. Solar cells were bought in batches of 10 or 20 from Radio Shack, and tested for efficiency by group members. The most efficient cells were kept for the project; the rest were returned to RadioShack. Once ready, OSCAR 10 was mounted aboard a private plane, and flown a couple of times to evaluate its performance and reliability. Special QSL cards were issued to those who participated in the airplane-based tests. Once it was found to be operative and reliable, the satellite was shipped to Kennedy Space Center, where it was mounted in the launch vehicle's third stageTemplate:Blue. OSCAR 10's dimensions were: Height: 1.35 m (53 in) Width: 2.0 m (78.75 in) Weight: 140 kg at launch; 90 kg post engine firings.[3]

Other satellites

USSR postal stamp depicting amateur radio satellitе RS-2

Other programs besides OSCAR have included Iskra (Soviet Union) circa 1982, JAS-1 (Fuji-OSCAR 12) (Japan) in 1986, RS (Soviet Union and Russia), and CubeSats. (There is a list of major amateur satellites in Japanese Wikipedia).

Es’hail 2 / QO-100 [4] Launched November 15, 2018.In geostationary orbit covering Brazil to Thailand.

Narrowband Linear transponder

2400.050 - 2400.300 MHz Uplink

10489.550 - 10489.800 MHz Downlink

Wideband digital transponder

2401.500 - 2409.500 MHz Uplink

10491.000 - 10499.000 MHz Downlink

Hardware

The first amateur satellites contained telemetry beacons. Since 1965, most OSCARs carry a linear transponder for two-way communications in real time. Some satellites have a bulletin board for store-and-forward digital communications, or a digipeater for direct packet radio connections.

Orbits

Amateur satellites have been launched into low Earth orbits and into highly elliptical orbits.

Operations

Satellite communications

Currently, amateur satellites support many different types of operation, including FM voice and SSB voice, as well as digital communications of AX.25 FSK (Packet radio) and PSK-31.

Mode designators

Uplink and downlink designations use sets of paired letters following the structure X/Y where X is the uplink band and Y is the downlink band. Occasionally, the downlink letter is rendered in lower case (i.e., X/y). With a few exceptions, the letters correspond to IEEE's standard for radar frequency letter bands...[5]

Designator Template:Center Template:Center Template:Center Template:Center Template:Center Template:Center Template:Center Template:Center Template:Center Template:Center Template:Center
Band 15 m 10 m 2 m 70 cm 23 cm 13 cm 9 cm 5 cm 3 cm 1.2 cm 6 mm
Frequency
(General) 		21 MHz 29 MHz 145 MHz 435 MHz 1.2 GHz 2.4 GHz 3.4 GHz 5 GHz 10 GHz 24 GHz 47 GHz

Prior to the launch of OSCAR 40, operating modes were designated using single letters to indicate both uplink and downlink bands. While deprecated, these older mode designations are still widely used in casual conversation.

  • Mode A: 2 m uplink / 10 m downlink
  • Mode B: 70 cm uplink / 2 m downlink
  • Mode J: 2 m uplink / 70 cm downlink

Doppler shift

Due to the high orbital speed of the amateur satellites, the uplink and downlink frequencies will vary during the course of a satellite pass. This phenomenon is known as the Doppler effect. While the satellite is moving towards the ground station, the downlink frequency will appear to be higher than normal. Hence, the receiver frequency at the ground station must be adjusted higher to continue receiving the satellite. The satellite in turn, will be receiving the uplink signal at a higher frequency than normal so the ground station's transmitted uplink frequency must be lower to be received by the satellite. After the satellite passes overhead and begins to move away, this process is reversed. The downlink frequency will appear lower and the uplink frequency will need to be adjusted higher. The following mathematical formulas relate the Doppler shift to the velocity of the satellite.

Where:
fd = doppler corrected downlink frequency
fu = doppler corrected uplink frequency
f = original frequency
v = velocity of the satellite relative to ground station in m/s.
Positive when moving towards, negative when moving away.
c = the speed of light in a vacuum (3×108  m/s).
Change in frequency Downlink Correction Uplink Correction
Δf=f×vc
fd=f(1+vc)
fu=f(1−vc)

Due to the complexity of finding the relative velocity of the satellite and the speed with which these corrections must be made, these calculations are normally accomplished using satellite tracking software. Many modern transceivers include a computer interface that allows for automatic doppler effect correction. Manual frequency-shift correction is possible, but it is difficult to remain precisely near the frequency. Frequency modulation is more tolerant of doppler shifts than single-sideband, and therefore FM is much easier to tune manually.

FM satellites

Yagi antenna being used to communicate through an FM satellite.

A number of low Earth orbit (LEO) OSCAR satellites use frequency modulation (FM).[6] These are also commonly referred to as "FM LEOs" or the "FM Birds". Such satellites act as FM amateur radio repeaters that can be communicated through using commonly available amateur radio equipment. Communication can be achieved with handheld transceivers using manual doppler correction.[7] Satellite passes are typically less than 15 minutes long.[8]

Launches

Past launches

The names of the satellites below are sorted in chronological order by launch date, ascending. The status column denotes the current operational status of the satellite. Green signifies that the satellite is currently operational, orange indicates that the satellite is partially operational or failing. Red indicates that the satellite is non operational and black indicates that the satellite has re-entered the Earth's atmosphere (or never successfully left it). The country listing denotes the country that constructed the satellite and not the launching country.

Launches (past and current)
Name Status Launched Country
OSCAR (OSCAR 1) Decayed 1961-12-12 Template:Flag
OSCAR II (OSCAR 2) Decayed 1962-06-02 Template:Flag
OSCAR III (OSCAR 3, EGRS-3) Non-Operational 1965-03-09 Template:Flag
OSCAR IV (OSCAR 4) Decayed 1965-12-21 Template:Flag
Australis-OSCAR 5 (OSCAR 5, AO-5, AO-A) Non-Operational 1970-01-23 Template:Flag
AMSAT-OSCAR 6 (OSCAR 6, AO-6, AO-C, P2A) Non-Operational 1972-10-15 Template:Flag
AMSAT-OSCAR 7 (OSCAR 7, AO-7, AO-B, P2B) Semi-Operational 1974-11-15 Template:Flag
AMSAT-OSCAR 8 (OSCAR 8, AO-8, AO-D, P2D) Non-Operational 1978-03-05 Template:Flag
Radio Sputnik 1 (RadioSkaf-1, RS-1) Non-Operational 1978-10-26 Template:Flag
Radio Sputnik 2 (RadioSkaf-2, RS-2) Non-Operational 1978-10-26 Template:Flag
UoSat-OSCAR 9 (UOSAT 1, UO-9) Decayed 1981-10-06 Template:Flag
Radio Sputniks RS3 through RS8 Non-Operational 1981-12-17 Template:Flag
AMSAT-OSCAR 10 (Phase 3B, AO-10, P3B) Non-Operational 1983-06-16 Template:Flag
Template:Flag
UoSat-OSCAR 11 (UoSat-2, UO-11, UoSAT-B) Semi-Operational 1984-03-01 Template:Flag
Fuji-OSCAR 12 (JAS 1, FO-12) Non-Operational 1986-08-12 Template:Flag
Radio Sputnik 10/11 (RadioSkaf-10/11, RS-10/11, COSMOS 1861) Non-Operational 1987-06-23 Template:Flag
AMSAT-OSCAR 13 (Phase 3C, AO-13, P3C) Decayed 1988-06-15 Template:Flag
UOSAT-OSCAR 14 (UoSAT-3, UO-14 UoSAT-D) Non-Operational 1990-01-22 Template:Flag
UOSAT-OSCAR 15 (UoSAT-4, UO-15, UoSAT-E) Non-Operational 1990-01-22 Template:Flag
AMSAT-OSCAR 16 (Pacsat, AO-16, Microsat-1) Semi-Operational 1990-01-22 Template:Flag
Dove-OSCAR 17 (Dove, DO-17, Microsat-2) Non-Operational 1990-01-22 Template:Flag
Weber-OSCAR 18 (WeberSAT, WO-18, Microsat-3) Non-Operational 1990-01-22 Template:Flag
LUSAT-OSCAR 19 (LUSAT, LO-19, Microsat-4) Non-Operational 1990-01-22 Template:Flag
Fuji-OSCAR 20 (JAS 1B, FO-20, Fuji-1B) Non-Operational 1990-02-07 Template:Flag
AMSAT-OSCAR 21 (RS-14, AO-21, Informator-1) Non-Operational 1991-01-29 Template:Flag
Radio Sputnik 12/13 (RadioSkaf-12/13, RS-12/13, COSMOS 2123) Non-Operational 1991-02-05 Template:Flag
UoSat-OSCAR 22 (UOSAT 5, UO-22 UoSAT-F) Non-Operational 1991-07-17 Template:Flag
KitSAT-OSCAR 23 (KITSAT 1, KO-23, Uribyol-1) Non-Operational 1992-08-10 Template:Flag
Arsene-OSCAR 24 (Arsene, AO-24) Non-Operational 1993-05-12 Template:Flag
KitSAT-OSCAR 25 (KITSAT B, KO-25, Kitsat-2, Uribyol-2) Non-Operational 1993-09-26 Template:Flag
Italy-OSCAR 26 (ITAMSAT, IO-26) Non-Operational 1993-09-26 Template:Flag
AMRAD-OSCAR 27 (EYESAT-1, AO-27) Non-Operational 1993-09-26 Template:Flag
POSAT-OSCAR 28 (POSAT, PO-28, Posat-1) Non-Operational 1993-09-26 Template:Flag
Radio Sputnik 15 (RadioSkaf-15, RS-15, Radio-ROSTO) Semi-Operational 1994-12-26 Template:Flag
Fuji-OSCAR 29 (JAS 2, FO-29, Fuji-2) Semi-Operational 1996-08-17 Template:Flag
Mexico-OSCAR 30 (UNAMSAT-2, MO-30, Unamsat-B, Kosmos-2334) Non-Operational 1996-09-05 Template:Flag
Template:Flag
Sputnik 40 Decayed 1997-11-03 Template:Flag/Template:Flag
Thai-Microsatellite-OSCAR 31 (TMSAT-1, TO-31) Non-Operational 1998-07-10 Template:Flag
Gurwin-OSCAR 32 Template:Webarchive (GO-32, Gurwin-1b, Techsat-1b) Non-Operational 1998-07-10 Template:Flag
SEDSat-OSCAR 33 (SEDSat, SO-33, SEDsat-1) Semi-Operational 1998-10-24 Template:Flag
Pansat-OSCAR 34 (PAN SAT, PO-34) Non-Operational 1998-10-29 Template:Flag
Sputnik 41 Decayed 1997-11-03 Template:Flag/Template:Flag
Sunsat-OSCAR 35 (SUNSAT, SO-35) Non-Operational 1999-02-23 Template:Flag
UoSat-OSCAR 36 (UOSAT 12, UO-36) Non-Operational 1999-04-21 Template:Flag
ASU-OSCAR 37 (AO-37, ASUsat-1, ASUSAT) Non-Operational 2000-01-27 Template:Flag
OPAL-OSCAR 38 (OO-38, StenSat, OPAL) Non-Operational 2000-01-27 Template:Flag
Weber-OSCAR 39 (WO-39, JAWSAT) Non-Operational 2000-01-27 Template:Flag
Saudi-OSCAR 41 (SO-41, Saudisat 1A) Non-Operational 2000-09-26 Template:Flag
Saudi-OSCAR 42 (SO-42, Saudisat 1B) Non-Operational 2000-09-26 Template:Flag
Malaysian-OSCAR 46 (MO-46, TIUNGSAT-1) Non-Operational 2000-09-26 Template:Flag
AMSAT-OSCAR 40 (AO-40, Phase 3D, P3D) Non-Operational 2000-11-16 Template:Flag
Starshine-OSCAR 43 (SO-43, Starshine 3) Decayed 2001-09-30 Template:Flag
Navy-OSCAR 44 (NO-44, PCSat) Semi-Operational 2001-09-30 Template:Flag
Navy-OSCAR 45 (NO-45, Sapphire) Non-Operational 2001-09-30 Template:Flag
BreizhSAT-OSCAR 47 (BO-47, IDEFIX CU1) Non-Operational 2002-05-04 Template:Flag
BreizhSAT-OSCAR 48 (BO-48, IDEFIX CU2) Non-Operational 2002-05-04 Template:Flag
AATiS-OSCAR 49 (AO-49, Safir-M, RUBIN 2) Non-Operational 2002-12-20 Template:Flag
Saudi-OSCAR 50 (SO-50, Saudisat-1C) Operational 2002-12-20 Template:Flag
CubeSat-OSCAR 55 Template:Webarchive (Cute-1) Operational 2003-06-30 Template:Flag
CubeSat-OSCAR 57 (CubeSat-XI-IV) Operational 2003-06-30 Template:Flag
CanX-1 Non-Operational 2003-06-30 Template:Flag
DTUSat Decayed 2003-06-30 Template:Flag
AAU Cubesat Non-Operational 2003-06-30 Template:Flag
RS-22 Template:Webarchive (Mozhayets 4) Operational 2003-09-27 Template:Flag
AMSAT-OSCAR 51 (Echo, AO-51) Non-Operational 2004-06-28 Template:Flag
VUSat-OSCAR 52 (HAMSAT, VO-52, VUSat) Non-Operational [9] 2005-05-05 Template:Flag
Template:Flag
PCSat2 (PCSAT2) Decayed 2005-08-03 Template:Flag
AMSAT-OSCAR 54 (AO-54, SuitSat, Radioskaf) Decayed 2005-09-08 International
eXpress-OSCAR 53 (XO-53, SSETI Express) Non-Operational 2005-10-27 European Space Agency
CubeSat-OSCAR 58 (CO-58, Cubesat XI-V) Non-Operational 2005-10-27 Template:Flag
UWE-1 Non-Operational 2005-10-27 Template:Flag
NCube-2 Deployment failure 2005-10-27 Template:Flag
CubeSat-OSCAR 56 (CO-56, Cute-1.7) Non-Operational 2006-02-21 Template:Flag
K7RR-Sat Launch Failure 2006-07-26 Template:Flag
CP2 Launch Failure 2006-07-26 Template:Flag
HAUSAT 1 Launch Failure 2006-07-26 Template:Flag
ICE Cube 1 Launch Failure 2006-07-26 Template:Flag
ICE Cube 2 Launch Failure 2006-07-26 Template:Flag
ION Launch Failure 2006-07-26 Template:Flag
KUTESat Launch Failure 2006-07-26 Template:Flag
MEROPE Launch Failure 2006-07-26 Template:Flag
nCUBE 1 Launch Failure 2006-07-26 Template:Flag
RINCON Launch Failure 2006-07-26 Template:Flag
SACRED Launch Failure 2006-07-26 Template:Flag
SEEDS Launch Failure 2006-07-26 Template:Flag
Voyager (Mea Huaka'i) Launch Failure 2006-07-26 Template:Flag
PicPot Launch Failure 2006-07-26 Template:Flag
HITSat-OSCAR 59 (HITSat, HO-59) Decayed 2006-09-22 Template:Flag
GeneSat-1 Template:Webarchive Decayed 2006-12-16 Template:Flag
Navy-OSCAR 60 (RAFT, NO-60) Decayed 2006-12-21 Template:Flag
Navy-OSCAR 61 (ANDE, NO-61) Decayed 2006-12-21 Template:Flag
Navy-OSCAR 62 (FCAL, NO-62) Decayed 2006-12-21 Template:Flag
FalconSAT-3 Decayed 2007-03-09 Template:Flag
Libertad-1 Non-Operational 2007-04-17 Template:Flag
CAPE-1 Non-Operational 2007-04-17 Template:Flag
CP3 Non-Operational 2007-04-17 Template:Flag
CP4 Non-Operational 2007-04-17 Template:Flag
Pehuensat-OSCAR 63 (PEHUENSAT-1, PO-63) Decayed 2007-10-01 Template:Flag
Delfi-OSCAR 64 (Delfi-C3, DO-64) Decayed 2008-04-28 Template:Flag
Cubesat-OSCAR 65 (Cute-1.7+APD II, CO-65) Operational? 2008-04-28 Template:Flag
Cubesat-OSCAR 66 (SEED II, CO-66) Operational 2008-04-28 Template:Flag
COMPASS-1 Semi-Operational 2008-04-28 Template:Flag
RS-30 Template:Webarchive (Yubileiny, RS-30) Operational 2008-05-23 Template:Flag
PRISM Template:Webarchive (HITOMI) Operational 2009-01-23 Template:Flag
KKS-1 Template:Webarchive (KISEKI) Operational 2009-01-23 Template:Flag
STARS (KUKAI) Unknown 2009-01-23 Template:Flag
Aggiesat2 Decayed 2009-07-30 Template:Flag
PARADIGM (BEVO-1) Decayed 2009-07-30 Template:Flag
Sumbandila-OSCAR 67 (SumbandilaSat, SO-67) Decayed 2009-09-17 Template:Flag
SwissCube Operational 2009-09-23 Template:Flag
ITUpSAT1 Operational 2009-09-23 Template:Flag
UWE-2 Operational 2009-09-23 Template:Flag
BEESAT Operational 2009-09-23 Template:Flag
Hope Oscar 68 Template:Webarchive (XW-1, HO-68) Beacon-Operational 2009-12-15 Template:Flag
AubieSat-1 Template:Webarchive (AO-71) Non-Operational 2011-10-28 Template:Flag
Masat-1 (MO-72) Decayed 2012-02-13 Template:Flag
ESTCube-1 Non-Operational 2013-05-07 Template:Flag
CAPE 2 (LO-75) Decayed 2013-11-20 Template:Flag
FUNcube-1 (AO-73) [1] Operational 2013-11-21 Template:Flag
Template:Flag
CubeBug-2 (LUSAT-OSCAR 74) Operational 2013-11-21 Template:Flag
$50SAT Non-Operational 2013-11-21 Template:Flag
DELFI-N3XT Non-Operational? 2013-11-21 Template:Flag
ARTSAT INVADER (CO-77) Decayed 2014-02-27 Template:Flag
Lituanica SAT-1 (LO-78) Decayed 2014-02-27 Template:Flag
FunCube-2 (UKube-1) Non-Operational 2014-07-08 Template:Flag
QB50P1 (EO-79, FUNcube-3) Non-Operational 2014-07-19 Template:Flag
QB50P2 Semi-Operational 2014-07-19 Template:Flag
ARTSAT2-DESPATCH Non-Operational 2014-12-03 Template:Flag
Shin’en-2 (FO-82) Non-Operational 2014-12-03 Template:Flag
BRICSat-P (OSCAR 83) Decayed 2015-05-20 Template:Flag
ParkinsonSAT (OSCAR 84, NO-84, PSAT) Decayed 2015-05-20 Template:Flag
LilacSat-2 (CAS-3H) Operational 2015-09-19 Template:Flag
XW-2 (CAS-3) Non-Operational 2015-09-19 Template:Flag
Lapan-A2 (IO-86) Operational 2015-09-28 Template:Flag
Fox-1A (OSCAR 85, AO-85) Non-Operational 2015-10-08 Template:Flag
HORYU-IV Non-Operational 2016-02-17 Template:Flag
CHUBUSAT-3 Non-Operational 2016-02-17 Template:Flag
ÑuSat-1 (LUSEX OSCAR 87, LO-87) Decayed 2016-05-30 Template:Flag
Nayif-1 (EO-88) Decayed 2017-02-15 Template:Flag
ITF 2 Decayed 2016-12-09 Template:Flag
LilacSat-1 (QB50, LO-90) Decayed 2017-04-18 Template:Flag
ZHUHAI-1 01/02 (CAS 4A/B) Non-Operational 2017-06-15 Template:Flag
Fox-1B (OSCAR 91, AO-91, RadFxSat) Semi-Operational 2017-11-18 Template:Flag
Fox-1D (OSCAR 92, AO-92) Decayed[10] 2017-01-12 Template:Flag
K2SAT Non-Operational 2018-03-12 Template:Flag
DSLWP-A (OSCAR 93, LO-93) Non-Operational 2018-05-20 Template:Flag
DSLWP-B (OSCAR 94, LO-94) Operational 2018-05-20 Template:Flag
Diwata-2 (Philippines-OSCAR 101, PO-101) Operational 2018-10-29 Template:Flag
Es'hail 2 (Qatar-OSCAR 100, QO-100, P4A) Operational 2018-11-15 Template:Flag
Fox-1Cliff (OSCAR 95, AO-95) Semi-Operational 2018-12-03 Template:Flag
ExseedSat-1 (VUsat-OSCAR 96, VO-96) Operational 2018-12-03 Template:Flag
JY1Sat (Jordan-OSCAR 97, JO-97) Operational 2018-12-03 Template:Flag
D-Star ONE Sparrow Operational 2018-12-27 Template:Flag
D-Star ONE iSat Operational 2018-12-27 Template:Flag
OrigamiSat (Fuji-OSCAR 98, FO-98) Decayed 2019-01-18 Template:Flag
NEXUS (Fuji-OSCAR 99, FO-99) Decayed 2019-01-18 Template:Flag
AISAT-1 (ExseedSat-2) Decayed 2019-04-01 Template:Flag
AztechSat 1 Non-Operational 2019-05-12 Template:Flag
CAS-7B (BIT Progress-OSCAR 102, BO-102) Decayed 2019-07-25 Template:Flag
BricSat-2 (Navy-OSCAR 103, NO-103) Decayed 2019-06-25 Template:Flag
PSAT-2 (Navy-OSCAR 104, NO-104) Decayed 2019-06-25 Template:Flag
HuskySat-1 (HO-107) Decayed 2019-11-02 Template:Flag
SMOG-P (Magyar-OSCAR 105, MO-105) Decayed 2019-12-06 Template:Flag
ATL-1 (Magyar-OSCAR 106, MO-106) Decayed 2019-12-06 Template:Flag
Taurus-1 (Jinniuzuo-1) Decayed 2019-12-09 Template:Flag
Tianqin-1 (CAS-6, TO-108) Operational 2019-12-20 Template:Flag
DOSAAF-85 (RS-44) Operational 2019-12-26 Template:Flag
BY70-2 Decayed 2020-07-03 Template:Flag
International Space Station (ISS) Operational 2020-09-02 Template:Flag
RadFxSat-2 (AmSat Fox-1, AO-109) Decayed 2024-01-17 Template:Flag
UVSQ-Sat Rarely 2021-01-24 Template:Flag
SDSAT (Satish Dhawan Sat) Decayed 2021-02-28 Template:Flag
SMOG-1 (Magyar-OSCAR 110, MO-110) Decayed 2021-03-22 Template:Flag
DIY-1 (DIY-OSCAR 111, DO-111) Decayed 2021-03-22 Template:Flag
GRBAlpha Operational 2021-03-22 Template:Flag
MIR-Sat 1 (MIRSAT-OSCAR 112, MO-112) Decayed 2021-06-03 Template:Flag
LEDSAT Operational 2021-08-17 Template:Flag
CAMSAT XW-3 (HO-OSCAR 113, HO-113, CAS-9) Operational 2021-12-26 Template:Flag
BDSat-2 Operational 2022-01-03 Template:Flag
EASAT-2 (Spain-OSCAR 114, SO-114) Operational 2022-01-13 Template:Flag
HADES (Spain-OSCAR 115, SO-115) Operational 2022-01-13 Template:Flag
SanoSat-1 (Nepal-OSCAR 116, NO-116) Decayed 2022-01-13 Template:Flag
Tevel 1-8 Decayed 2022-01-13 Template:Flag
Planetum-1 Operational 2022-05-25 Template:Flag
ForeSail 1 Failure 2022-05-25 Template:Flag
GreenCube (Italy-OSCAR 117, IO-117) Operational 2022-07-13 Template:Flag
Fengtai Shaonian 2 (CAS-5A, Fengtai-OSCAR 118, FO-118) Operational 2022-12-09 Template:Flag
XiWang-4 (Hope-OSCAR 119, HO-119, XW-4, CAS-10) Operational 2022-11-12 Template:Flag
EOS–07 (APRSDP-BTN) Operational 2023-02-10 Template:Flag
INSPIRE-Sat 7 Decayed 2023-04-15 Template:Flag
RoseyCubesat-1 Operational 2023-04-15 Template:Flag Template:Flag
IRIS-C Operational 2023-04-15 Template:Flag
MAYA-6 Decayed 2023-07-19 Template:Flag
Veronika Operational 2023-11-11 Template:Flag
HADES-D (SO-121) Operational 2023-11-11 Template:Flag
SONATE-2 Operational 2024-03-04 Template:Flag
Kashiwa (柏) Decayed 2024-03-23 Template:Flag
MESAT-1 Operational 2024-07-04 Template:Flag
KUBE/QUBE Operational 2024-08-16 Template:Flag
SAKURA Future 2024-08-29 Template:Flag

In development

Facts

Multinational effort

Currently, 30 countries have launched an OSCAR satellite. These countries, in chronological order by date of launch, include: Template:Div col

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SuitSat, an obsolete Russian space suit with a transmitter aboard, was officially known as "AMSAT-OSCAR 54". Coincidentally, "Oscar" was the name given to an obsolete space suit by its young owner in the 1958 novel Have Space Suit—Will Travel, by Robert A. Heinlein. This book was first published a year after the launch of Sputnik 1, the world's first artificial satellite.

International regulation

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FASTRAC-A and FASTRAC-B amateur satellite, University of Texas at Austin

Amateur-satellite service (also: amateur-satellite radiocommunication service) is – according to Article 1.57 of the International Telecommunication Union's (ITU) Radio Regulations (RR)[12] – defined as «A radiocommunication service using space stations on earth satellites for the same purposes as those of the amateur service.»

Classification

This radiocommunication service is classified in accordance with ITU Radio Regulations (article 1) as follows:
Radiocommunication service (article 1.19)

Frequency allocation

The allocation of radio frequencies is provided according to Article 5 of the ITU Radio Regulations (edition 2012).[13]

In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document were incorporated in national Tables of Frequency Allocations and Utilisations which is within the responsibility of the appropriate national administration. The allocation might be primary, secondary, exclusive, and shared.

  • primary allocation: is indicated by writing in capital letters (see example below)
  • secondary allocation: is indicated by small letters (see example below)
  • exclusive or shared utilization: is within the responsibility of national administrations
Example of frequency allocation
Allocation to services
     Region 1             Region 2             Region 3       
135.7–137.8 kHz
FIXED
MARITIME MOBILE
Amateur
 135.7–137.8
FIXED
MARITIME MOBILE
Amateur
 135.7–137.8
FIXED
MARITIME MOBILE
RADIO NAVIGATION
Amateur
7 000–7 100   AMATEUR
AMATEUR-SATELLITE
14 000–14 250    AMATEUR
AMATEUR-SATELLITE
18 068–18 168    AMATEUR
AMATEUR-SATELLITE
21 000–21 450    AMATEUR
AMATEUR-SATELLITE
24 890–24 990    AMATEUR
AMATEUR-SATELLITE
28–29.7 MHz       AMATEUR
AMATEUR-SATELLITE
144–146              AMATEUR
AMATEUR-SATELLITE
5 830–5 850
FIXED-SATELLITE
(space-to-Earth)
RADIOLOCATION
Amateur
Amateur-satellite
(space-to-Earth)
 5 830–5 850
RADIOLOCATION
Amateur
Amateur-satellite
(space-to-Earth)
10.5–10.6 GHz    AMATEUR
AMATEUR-SATELLITE
24–24.05             AMATEUR
AMATEUR-SATELLITE
47–47.2              AMATEUR
AMATEUR-SATELLITE
76–77.5               RADIO ASTRONOMY
RADIOLOCATIONY
Amateur
Amateur-satellite
Space research (space-to-Earth)
77.5–78               AMATEUR
AMATEUR-SATELLITE
Radio astronomy
Space research (space-to-Earth)
78–79                  RADIOLOCATION
Amateur
Amateur-satellite
Radio astronomy
Space research (space-to-Earth)
79–81                 RADIOLOCATION
RADIO ASTRONOMY
Amateur
Amateur-satellite
Space research (space-to-Earth)
134–136              AMATEUR
AMATEUR-SATELLITE
Radio astronomy
136–141              RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite
241–248              RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite
248–250              AMATEUR
AMATEUR-SATELLITE
Radio astronomy

Additional allocations

In addition to the formal allocations in the main table such as above, there is also a key ITU-R footnote RR 5.282 that provides for additional allocations:-

5.282 In the bands 435-438 MHz, 1 260-1 270 MHz, 2 400-2 450 MHz, 3 400-3 410 MHz (in Regions 2 and 3 only)
and 5 650-5 670 MHz, the amateur-satellite service may operate subject to not causing harmful interference to other
services operating in accordance with the Table (see No. 5.43). Administrations authorizing such use shall ensure that
any harmful interference caused by emissions from a station in the amateur-satellite service is immediately eliminated
in accordance with the provisions of No. 25.11. The use of the bands 1 260-1 270 MHz and 5 650-5 670 MHz by the
amateur-satellite service is limited to the Earth-to-space direction.

Of these, the 435-438 MHz band is particularly popular for amateur/educational small satellites such as Cubesats.

References

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  • Martin Davidoff: The Radio Amateur's Satellite Handbook. The American Radio Relay League, Newington, Template:ISBN.

Notes

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  1. ↑ ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.57, definition: amateur-satellite service / amateur-satellite radiocommunication service
  2. ↑ Template:Cite web
  3. ↑ Template:Cite web
  4. ↑ Template:Cite web
  5. ↑ Standard Radar Frequency Letter-Band Nomenclature (IEEE Standard 521-1984, IEEE Std 521-2002(R2009))
  6. ↑ Template:Cite web
  7. ↑ Template:Cite web
  8. ↑ Template:Cite web
  9. ↑ Template:Cite web
  10. ↑ Template:Cite web
  11. ↑ Template:Cite web
  12. ↑ ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.57, definition: amateur-satellite service / amateur-satellite radiocommunication service
  13. ↑ ITU Radio Regulations, CHAPTER II – Frequencies, ARTICLE 5 Frequency allocations, Section IV – Table of Frequency Allocations
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