Digital Satellites

Digital satellites receive and transmit computer-generated messages over the radio similar to modem communication over a telephone line. The amateur digital satellites have store and forward messaging capability and/or digital repeaters (called digipeaters). Most amateur digital satellites require a specialized Terminal Node Controller (TNC) to correctly modulate the digital signal. An excellent source of information on satellite TNCs (and digital communications in general) is the Tucson Amateur Packet Radio (TAPR) Web page.

Note that the digital satellites each have their own unique call sign required to establish communications.

Satellite ID

Call Sign

Uplink Freq. MHz

Uplink Mode

Downlink Freq. MHz

Downlink Mode

Type

AO-16

PACSAT

145.900, 145.920, 145.960

FM

437.0513

SSB

1200 Baud PSK

DO-17

DOVE

-

-

145.825

FM

1200 Baud AFSK

DO-17

DOVE

-

-

2401.2205

SSB

1200 Baud BPSK

FO-29

8J1JCS

145.850, 145.870, 145.890, 145.910

FM

435.910

FM

1200 or 9600 Baud PSK

GO-32

Techsat

145.850, 145.890, 145.930, 1269.700, 1269.800, 1269.900

FM

435.325, 435.225

SSB

9600 Baud BPSK

IO-26

ITMSAT

145.875, 145.900, 145.925, 145.950

FM

435.822

SSB

1200 Baud PSK

KO-23

HL01

145.850, 145.900

FM

435.175

FM

9600 Baud FSK

KO-25

HL02

145.870

FM

436.500

FM

9600 Baud FSK

LO-19

LUSAT

145.840, 145.860, 145.880, 145.900

FM

437.1528

SSB

1200 Baud PSK AX.25

PO-28

POSAT

145.975

FM

435.2777

FM

9600 Baud FSK

PO-34

PANSAT

TBD

SS

TBD

SS

9600 Baud DSSS

SO-35

SUNSAT

436.290

FM

145.825

FM

9600 FSK 1200 AFSK

SO-35

SUNSAT

145.825

FM

436.250

FM

9600 FSK

SO-35

SUNSAT

145.900

FM

436.250

FM

1200 AFSK

TO-31

TMSAT1-12 TMSAT1-11

145.925, 145.975

FM

436.925, 436.900, 436.950, 436.975

SSB

9600 Baud BPSK

UO-11

-

-

-

145.825

FM

1200 Baud PSK

UO-22

UOSAT5

145.900, 145.975

FM

435.120

FM

9600 Baud FSK

UO-36

UOSAT12

TBD

 

437.025, 437.400

 

 

WO-18

WEBERSAT

-

-

437.104

SSB

1200 Baud PSK AX.25

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Digital satellites let you communica te data messages and pictures over radio links

Many digital satellites have data file store and forward Bulletin Board System (BBS) capability, allowing you to upload and download files as the spacecraft passes overhead