Operating Satellites With a Handheld: Working FM Birds on 2m and 70cm

You don't need a tracking dish or a room full of gear to work amateur satellites. A Technician-class license, a dual-band handheld, and a decent pass overhead — that's genuinely all it takes to make your first satellite QSO.

FM amateur satellites (affectionately called "FM birds") are basically flying repeaters. Uplink on one band, downlink on another, and for about 10-15 minutes per pass, you can work stations hundreds or even thousands of miles away using a radio that fits in your jacket pocket.

This guide will get you from zero to your first satellite contact.

Which Satellites Are Active Right Now?

The amateur satellite landscape changes — birds fail, new ones launch. As of 2026, the most reliably active FM satellites include:

• SO-50 (SaudiSat-1C): Uplink 145.850 MHz (67.0 Hz CTCSS tone required), downlink 436.795 MHz. The workhorse. Been up since 2002 and still going. Requires a 74.4 Hz tone burst on 145.850 for about 2 seconds to activate the transponder, then switch to 67.0 Hz for voice.
• PO-101 (Diwata-2): Uplink 145.900 MHz (141.3 Hz CTCSS), downlink 437.500 MHz. Available intermittently — check AMSAT status page.
• ISS (ARISS): Uplink 145.990 MHz, downlink 145.800 MHz (same band — 2m crossband is NOT required). The ISS repeater operates in FM cross-band mode occasionally, and scheduled school contacts happen regularly. Operations aren't continuous.
• TEVEL satellites (TEVEL-1 through TEVEL-8): Uplink 145.970 MHz, downlink 436.400 MHz. Israeli CubeSats with FM transponders.

Check amsat.org/status and the AMSAT-NA satellite status page before heading out. Things change week to week.

Gear: What You Actually Need

The Radio

Any dual-band HT that does 2m and 70cm FM will work. The critical features:

• 5W output on both bands (more is better for uplink, but 5W works)
• Ability to program CTCSS tones
• Full-duplex operation is a huge advantage but not mandatory

Full duplex means the radio can transmit on one band while simultaneously receiving on the other. This lets you hear your own downlink in real time — you know immediately if you're hitting the satellite. Most budget HTs are half-duplex (you go deaf while transmitting).

Radios with full duplex capability:

• Yaesu FT-60R (discontinued but widely available used, ~$100-150)
• Kenwood TH-D75A (current production, ~$650, also does D-STAR and APRS)
• Yaesu VX-6R (discontinued, waterproof, used market ~$200)
• Various Quansheng and TYT models claim full duplex — test before trusting

Honestly? I made my first 30+ satellite contacts with a Baofeng UV-5R. Half duplex, 4 watts, terrible front-end filtering. It worked. Not ideal, but it worked. You don't need a $600 radio to get started.

The Antenna

This is where you can go from "barely hearing the bird" to "solid contacts every pass."

The stock rubber duck antenna on your HT is the worst possible choice for satellites. It's a compromise on a good day, and for satellite work where you're dealing with a transponder 400+ km away moving at 7.5 km/s — you need gain.

Options from cheapest to best:

1. Arrow II satellite antenna (~$80): A handheld yagi with separate 2m (3-element) and 70cm (7-element) beams on the same boom. This is the gold standard for handheld satellite work. About 7-8 dBi on 70cm, 5-6 dBi on 2m. You hold it in one hand and point at the satellite.

2. Elk Antennas 2M/440L5 log-periodic (~$120): Similar concept, slightly broader beamwidth (more forgiving if your tracking is off).

3. DIY tape-measure yagi: Plans all over the internet. $20 in parts from the hardware store. Performance is close to the Arrow if you build it carefully.

4. 1/4-wave ground plane or whip upgrade: Better than a rubber duck, but you'll struggle to make contacts except on the strongest passes directly overhead.

I keep an Arrow antenna in my car trunk. Total satellite station fits in a backpack — radio, antenna, phone for tracking, and a notepad for logging. The whole setup weighs maybe 4 pounds.

Tracking Satellites: Know When and Where to Point

Satellites are predictable. Their orbits are published as TLE (Two-Line Element) data, and tracking apps calculate exactly when each satellite rises above your horizon, its maximum elevation, and when it sets.

Tracking Apps

• AMSAT-NA app (free, iOS/Android): Purpose-built for ham satellites. Shows pass predictions, transponder info, Doppler-corrected frequencies.
• Heavens-Above (web + app): Great pass predictions, visual magnitude info.
• Look4Sat (free, Android): Lightweight, ham-satellite focused, shows antenna pointing.
• Gpredict (free, Windows/Mac/Linux): Desktop app, very detailed, supports radio CAT control for Doppler correction.

You want passes above 20° maximum elevation for FM bird work with a handheld yagi. Below that, you're shooting through too much atmosphere and the pass duration is too short. Overhead passes (70°+) are ideal — stronger signals, longer window.

Reading a Pass Prediction

A typical pass entry looks like:

SO-50 | AOS 14:32 UTC | MAX EL 67° (SW) 14:38 UTC | LOS 14:44 UTC

• AOS (Acquisition of Signal): when the satellite rises above your horizon
• MAX EL: highest point in the sky during this pass
• LOS (Loss of Signal): when it drops below the horizon

This pass is 12 minutes long with a 67° max elevation. That's a prime pass.

The Doppler Problem

Here's the thing most tutorials skip or overcomplicate.

The satellite is moving toward you, then away from you. This shifts the frequency. On 70cm downlink, Doppler shift can be ±10 kHz over a pass. On 2m, it's about ±3.5 kHz.

For FM with 5 kHz deviation, the 2m Doppler is mostly within receiver bandwidth — you won't notice much. But on 70cm, you'll hear the signal drift from high to low as the satellite transits.

Practical approach for FM birds:

• Uplink (your TX on 2m): Don't bother correcting. The satellite's receiver is wide enough.
• Downlink (your RX on 70cm): Pre-program three frequencies: nominal, +5 kHz, and -5 kHz. When the signal gets weak, click up or down.

Or just tune ±5 kHz on the fly if your radio has a VFO knob. This isn't precision work. Nope.

Making Your First Contact

Before the Pass

1. Program the correct uplink frequency with CTCSS tone
2. Program the downlink frequency (and ±5 kHz offsets)
3. Set your radio to high power (5W) on transmit
4. Have your tracking app running — know where the satellite will rise
5. Point your antenna at the AOS point and wait

During the Pass

FM satellites are shared resources. The transponder handles one signal at a time — strongest signal wins (capture effect). This means:

• Keep transmissions SHORT. "W1ABC grid FN31" is a complete call. Three seconds max.
• Listen first. If someone's in QSO, wait for a gap.
• Don't call CQ unless you hear dead air. On a busy SO-50 pass, there might be 30 stations trying to get through.
• Be ready with your grid square — satellite contacts are typically quick exchanges of callsign and grid.

A typical satellite QSO:

"W1ABC FN31" "W1ABC, KD9XYZ EM48, 73!" "KD9XYZ, thanks, 73!"

Done. Three seconds each. That's all you need for a valid contact and a new grid square logged.

I remember my first SO-50 contact — spent three passes unable to get through because I was calling CQ like it was a repeater. Long calls, waiting for responses. Meanwhile, seasoned sat ops were rattling off callsign-grid in two seconds and moving on. Lesson learned: satellite operating is speed chess, not a ragchew.

Full Duplex Advantage

If your radio does full duplex, you can hear your own signal coming back through the satellite while you transmit. If you can hear yourself on the downlink, you know:

1. You're hitting the satellite
2. Your audio level is adequate
3. You're not being stepped on

This is a massive advantage. Without full duplex, you're transmitting blind and hoping. It works — I did it for months — but full duplex takes the guesswork out entirely.

Working the ISS

The International Space Station has ham radio equipment on board (multiple Kenwood and Ericsson radios). Operations include:

• ARISS school contacts: Scheduled events where astronauts talk to students. You can listen on 145.800 MHz.
• Cross-band repeater: When activated, uplink 145.990 MHz (no tone required), downlink 145.800 MHz. Check ariss.org for current status.
• Random QSOs: Astronauts occasionally get on the radio during personal time. Usually on 145.800 MHz FM. This is rare but it happens.

The ISS is loud. Very loud. 25 watts from about 420 km altitude with a solid antenna. You can hear it on a rubber duck antenna easily. Even making contacts on the repeater is possible with just a whip if the pass is overhead.

But here's the catch — everyone can hear it, which means everyone is trying to get through simultaneously. ISS repeater passes are chaotic. Pure alligator territory (all mouth, no ears). Still fun though.

Tips From 200+ Satellite Passes

A few things I've learned that most guides don't mention (probably because they sound obvious in retrospect):

• Wind kills satellite work. You're hand-holding a yagi and tracking a moving target. Gusty conditions make this miserable. Calm days only.
• Practice tracking aircraft before your first satellite pass. Point your yagi at a plane crossing the sky to get the feel of smooth tracking at satellite speeds.
• Bring a folding chair. You'll be looking up at weird angles for 12+ minutes. Your neck will thank you.
• Log immediately. After a pass with 4 rapid-fire QSOs, you WILL forget callsigns. Voice record the pass on your phone.
• Satellite grids count for VUCC. The VHF/UHF Century Club award accepts satellite contacts. You need 100 unique grid squares — totally achievable with consistent satellite operating.

Get Out There

Look up the next SO-50 pass over your location. Program your HT. Step into the backyard. If you have a directional antenna, great. If not, try anyway on a high pass — you might surprise yourself.

Satellite work is the most fun-per-dollar activity in amateur radio. Contacts hundreds of miles away on a $30 radio and a $80 antenna, using a satellite you can see crossing the sky. It never stops being cool.