Satellites Likely to Be Active on Field Day (2021)

AMSAT and ARRL Field Day are this upcoming weekend (June 26-27). Satellites that should be available for communication, along with frequency information, are listed below.

FM Satellites

Please make only one QSO on an FM satellite. Additional QSOs on FM satellites do not count for points in ARRL or AMSAT Field Day.

AO-91 (RadFxSat / Fox-1B)
Uplink FM
(67 Hz CTCSS)
Downlink FM Comments
AO-91 (RadFxSat / Fox-1B) 435.250 MHz 145.960 MHz Due to battery status, please do not attempt to access while in eclipse (nighttime passes). Satellite may cut out at times during daytime passes due to low battery voltages.
FROM AMSAT OPERATIONS – PLEASE DO NOT ATTEMPT TO USE ON NIGHTTIME PASSES
SO-50 (SaudiSat-1C)
Uplink FM
(67 Hz CTCSS)
Downlink FM Comments
SO-50 (SaudiSat-1C) 145.850 MHz 436.795 MHz Operational
Likely to be available for all passes during Field Day. SO-50 also has a 10 minute timer that must be armed before use. Transmit a 2 second carrier with a CTCSS tone of 74.4 Hz to arm the timer.
PO-101 (Diwata-2)
Uplink FM
(141.3 Hz CTCSS)
Downlink FM Comments
PO-101 (Diwata-2) 437.500 MHz 145.900 MHz Operational
Check https://twitter.com/Diwata2PH for schedule updates. Likely to be available at least for daytime passes during Field Day. PO-101 is very easy to hear but does need a decent amount of uplink power to reliably access.
CAS-3H (LilacSat-2)
Uplink FM Downlink FM Comments
CAS-3H (LilacSat-2) 144.350 MHz 437.200 MHz Operational, but rarely active
The FM transponder is on no set schedule and may or may not be on for Field Day. For real time updates about which mode the satellite is in, see the AMSAT Live OSCAR Satellite Status Page
IO-86 (LAPAN-A2)
Uplink FM
(88.5 Hz CTCSS)
Downlink FM Comments
IO-86 (LAPAN-A2) 145.880 MHz 435.880 MHz Operational
Satellite is in a low-inclination low earth orbit and not visible north of about 30 degrees north or south of 30 degrees south. Should be usable if active from southern regions of Texas and Florida. FM transponder operations are by schedule only. See https://twitter.com/lapansat for the latest schedule.
AO-27 
Uplink FM Downlink FM Comments
AO-27 145.850 MHz 436.795 MHz Operational
AO-27 is only active for approximately four minutes on ascending and descending passes over mid-latitudes of the Northern Hemisphere
ISS Crossband Repeater
Uplink FM
(67 Hz CTCSS)
Downlink FM Comments
ISS Crossband Repeater 145.990 MHz 437.800 MHz Operational
The ARISS team intends for the crossband repeater to be active during Field Day. See ARISS Status for status information
© 2021 AMSAT

Linear Transponder Satellites

Make as many QSOs as possible. Note that for ARRL Field Day, you may only contact the same station once on any satellite for points. For AMSAT Field Day scoring, you may contact any station once per mode on each satellite, so you may work the same station up to two times on each satellite (once in voice and once in CW).

AO-7 Mode B – U/v Inverting Analog SSB/CW
Uplink LSB 432.125 MHz through 432.175 MHz
Downlink USB 145.925 MHz through 145.975 MHz
Active only in sunlight. Beacon 145.975 MHz. May flip into Mode A or off due to high utilization.
AO-73 (FUNcube-1) – U/v Inverting Analog SSB/CW
Uplink LSB 435.130 MHz through 435.150 MHz
Downlink USB 145.950 MHz through 145.970 MHz
1k2 BPSK 145.935 MHz telemetry. Currently in full-time transponder mode and should be active for Field Day. See FUNcube Data Warehouse for current status. Note that the AO-73 transponder frequency is not stable and you may have to tune a significant amount away from the nominal frequency.
XW-2A (CAS-3A) – U/v Inverting Analog SSB/CW
Uplink LSB 435.030 MHz through 435.050 MHz
Downlink USB 145.665 MHz through 145.685 MHz
CW Beacon 145.660 MHz. Digital Telemetry 145.640 MHz 9.6/19.2kbps, GMSK
XW-2B (CAS-3B) – U/v Inverting Analog SSB/CW
Uplink LSB 435.090 MHz through 435.110 MHz
Downlink USB 145.730 MHz through 145.750 MHz
CW Beacon 145.725 MHz. Digital Telemetry 145.705 MHz 9.6/19.2kbps, GMSK
XW-2C (CAS-3C) – U/v Inverting Analog SSB/CW
Uplink LSB 435.150 MHz through 435.170 MHz
Downlink USB 145.795 MHz through 145.815 MHz
May be intermittent (2 seconds on, 5 seconds off) and difficult to use. CW Beacon 145.790 MHz. Digital Telemetry 145.770 MHz 9.6/19.2kbps, GMSK
XW-2D (CAS-3D) – U/v Inverting Analog SSB/CW
Uplink LSB 435.210 MHz through 435.230 MHz
Downlink USB 145.860 MHz through 145.880 MHz
May be intermittent (2 seconds on, 5 seconds off) and difficult to use. CW Beacon 145.855 MHz. Digital Telemetry 145.835 MHz 9.6/19.2kbps, GMSK
XW-2F (CAS-3F) – U/v Inverting Analog SSB/CW
Uplink LSB 435.330 MHz through 435.350 MHz
Downlink USB 145.980 MHz through 146.000 MHz
CW Beacon 145.975 MHz. Digital Telemetry 145.955 MHz 9.6kbps, GMSK
EO-88 (Nayif-1 / FUNcube on Nayif-1) – U/v Inverting Analog SSB/CW
Uplink LSB 435.015 MHz through 435.045 MHz
Downlink USB 145.960 MHz through 145.990 MHz
FUNcube on Nayif-1 1.2kbps BPSK telemetry 145.940 MHz. Transponder only operational when satellite is in eclipse. Likely only usable in the southern parts of North America for Field Day.
CAS-4A – U/v Inverting Analog SSB/CW
Uplink LSB 435.210 MHz through 435.230 MHz
Downlink USB 145.860 MHz through 145.880 MHz
CW Beacon 145.855 MHz. Digital Telemetry 145.835 MHz 4.8kbps GMSK
CAS-4B – U/v Inverting Analog SSB/CW
Uplink LSB 435.270 MHz through 435.290 MHz
Downlink USB 145.915 MHz through 145.935 MHz
CW Beacon 145.910 MHz. Digital Telemetry 145.890 MHz 4.8kbps GMSK
JO-97 (JY1Sat) – U/v Inverting Analog SSB/CW
Uplink LSB 435.100 MHz through 435.120 MHz
Downlink USB 145.855 MHz through 145.875 MHz
Transponder currently active full-time
TO-108 (CAS-6) – U/v Inverting Analog SSB/CW
Uplink LSB 435.270 MHz through 435.290 MHz
Downlink USB 145.915 MHz through 145.935 MHz
Transponder currently intermittent, operating for a few minutes at a time. CW Beacon 145.910 MHz. 4.8k GMSK telemetry 145.890 MHz. Beacons currently carrier only.
RS-44 – V/u Inverting Analog SSB/CW
Uplink LSB 145.935 MHz through 145.995 MHz
Downlink USB 435.610 MHz through 435.670 MHz
Significant fading is expected as the satellite is attached to the upper stage of the launch vehicle, but should be very reliable for Field Day use. CW Beacon 435.605 MHz
FO-99 (NEXUS) – V/u Inverting Analog SSB/CW
Uplink LSB 145.900 MHz through 145.930 MHz
Downlink USB 435.880 MHz through 435.910 MHz
Scheduled to be activated for 30-45 minutes at 22:55 UTC and 00:28 UTC on Saturday evening for Eastern North America. The activation at 22:55 UTC will primarily benefit the northeast United States and Maritime provinces. The 00:28 UTC activation should provide service for most of Eastern North America. The schedule can be found at https://www.jamsat.or.jp/wordpress/wp-content/uploads/2021/05/nexus202106.jpg
© 2021 AMSAT

Digital Satellites

NO-84 and NO-104’s HF-to-UHF PSK31 transponders should be available for Field Day use. Their digipeaters may also be available. For more information, visit http://aprs.org/psat.html for NO-84 information and http://aprs.org/psat2.html for NO-104 information.

FalconSAT-3 is currently offline.

GRBAlpha has a 9k6 unproto digipeater at 437.025 MHz simplex and could be used for Field Day QSOs. Digipeat via OM9GRB.