To receive APT transmissions from the NOAA weather satellites, you require a receiver. The satellites transmit their datastream in the 137 MHz band using frequency modulation (FM). Although you can listen to their 'tick-tock' signature using a fairly inexpensive scanner and whip antenna such a system will not enable the reception of good images.
The reason for this apparent anomaly is due to the bandwidth of the signal. Most scanning receivers have available FM bandwidths of either 150kHz, for FM broadcasts, or about 5kHz for amateur or mobile service transmissions. Weather satellite signals require a bandwidth of 40kHz - 50kHz to accommodate the signal itself plus the Doppler effect. The Doppler effect is identical with the familiar change in pitch of a police car siren as it approaches then recedes from you - initially high pitched, becoming lower as the satellite firstly approaches the listener, flies overhead, then recedes again, this variation is added or subtracted to the signal thus widening its bandwidth.
Therefore a specialised receiver is necessary.
R2ZX APT Receiver
Full computer control, WXtoImg compatible. Twin antenna sockets for diversity reception - automatic selection of the strongest signal. Fully cased and ready to go.
A 'hardened' version of the R2FX having exceptional resistance to the in-band pager signals plaguing APT users in the UK.
Alternatives found on the web
The Kosmek receiver is part of a complete APT receiving system designed by the VFS (Vision From Space) group in the Ukraine. It can be operated stand-alone or by computer control by serial port link. More
Wrasse WeSaCom APT-06 Weather Satellite Receiver. Now available with antenna diversity.
The signals from the NOAA weather satellites are transmitted with right-hand circular polarisation. There are two common solutions to this problem, the crossed dipole (or turnstile) and the quadrifilar helix (QFH) antenna (in each case, designed and tuned specifically for the 137 MHz band).
Audiovox Sirius SIREXT50 Indoor/Outdoor Antenna Extension 50-feet Cable - Black
- Easy setup: Simply place the Indoor/Outdoor Home Antenna where the strongest signal is
- For use indoors or out: Weather-resistant rubber cover protects the connection to the Home Antenna
- Boost the signal: An in-line singal amplifier boosts the signal strength through the length of the combined cable
- Add 50 to the length of the Indoor/Outdoor Home Atenna Cable.
- Easy setup: Simply place the Indoor/Outdoor Home Antenna where the strongest signal is.
- For use indoors or out: Weather-resistant rubber cover protects the connection to the Home Antenna.
- Boost the signal: An in-line singal amplifier boosts the signal strength through the length of the combined cable.
- Portable and SIRIUS|XM MiRGE Radio Home Kits and Sound Systems as well as all SIRIUS-ready Tuners.
Great New KMR-D365BT Kenwood Marine Boat Yacht Outdoor Bluetooth Stereo CD MP3 Player USB iPod iPhone Pandora AM/FM Reciver, 4 X Kenwood 6.5" Inch Waterproof Speakers Enrock Antenna - Marine Audio Kit
Car Audio or Theater (Kenwood Enrock)
- Package Includes: 1 X Kenwood KMRD365 BT Stereo (Replaces KMR-D362BT model)2 X Pair Of Kenwood Spekaers 1 X Enrock Antenna
- AM/FM radio with station presets, CD player for standard audio CDs and also CDRs burned with MP3 or WMA files, 200 watts peak power (50 watts x 4 channels), Removable...
- Display dimmer function, SiriusXM satellite radio ready (requires SXV200B receiver and antenna sold separately) Wired remote ready for up to 6 waterproof remotes...
- Kenwood KFC-1633MRW 6.5 200W Marine Speakers (2 Pairs) Power Handling: Peak: 200 watts per pair / 100 watts each, RMS: 40 watts per pair / 20 watts each, Waterproof...
- Enrock Dipole Marine Motorcycle Audio Hideaway Flexible Antenna (Black)
Dual Electronics AMB600W Marine Boat Bluetooth CD/MP3 Stereo Receiver Bundle Combo With MWR15 Waterproof Wired Remote Control + SiriusXM SXV300v1 Satellite Radio Tuner Kit + Enrock 22" Radio Antenna
Car Audio or Theater (Dual Enrock)
- PACKAGE BUDLE KIT INCLUDES: 1 Dual AMB600W Marine CD MP3 Receiver with iPod Control NOAA and Bluetooth = 1 Dual MWR15 Waterproof Marine Wired Remote Control = 1...
- RECEIVER UNIT: This top of the line CD receiver features direct USB control for iPod /iPhone devices and is SiriusXM-Ready. It provides basic control for select...
- REMOTE CONTROL: Control your music remotely, from the cockpit, bridge or stateroom with this IPX6 waterproof, UV and salt-resistant hard-wired remote control device...
- SATELLITE TUNER: the SXV300V1 plugs into your SiriusXM-ReadyTM car stereo without the need for any additional cables or interfaces. This complete package includes...
- RADIO ANTENNA: This Enrock Hydra series water-resistant antenna provides excellent radio reception wherever you are. Its 22 cable works great on land or at sea...