🛰️ Ham Satting

Q: What is the SSTV Decoder?

A: The SSTV (Slow Scan Television) Decoder allows you to decode images from audio recordings of SSTV transmissions. These transmissions are commonly used by satellites like the ISS and amateur radio operators to send images over radio frequencies.

Q: What SSTV modes are supported?

A: Ham Satting supports multiple SSTV modes:

• Robot: Robot 36, Robot 72
• Scottie: Scottie 1, 2, 3, 4, DX
• Martin: Martin 1, 2, 3
• PD: PD 50, 90, 120, 160, 180, 240, 290

Q: How do I decode an SSTV image?

A: Follow these steps:

• Record the SSTV audio transmission as a WAV file
• Open the SSTV Decoder in Ham Satting
• Tap "Browse File" and select your audio file
• Select the correct SSTV mode (e.g., Robot 36, PD 180)
• The image will decode automatically
• Use Shift, Slant, and Start controls to fine-tune if needed

Q: My decoded SSTV image has color bands or looks misaligned. How do I fix it?

A: Use the adjustment controls:

• Shift: Moves the image horizontally. Use if you see color bars on edges.
• Slant: Corrects diagonal skewing. Use if the image appears tilted.
• Start: Adjusts where decoding begins. Increase if colors are misaligned or you see noise at the start.

Also try selecting a different SSTV mode - the image may have been transmitted in a different format than expected.

Q: What audio format should I use for SSTV decoding?

A: WAV format at 44100 Hz sample rate is recommended for best results. The decoder also supports MP3, M4A, AAC, OGG, and FLAC formats.

Q: What SSTV mode does the ISS use?

A: The ISS commonly uses PD 120 or PD 180 modes for SSTV transmissions. During special events, they may use other modes - check ARISS announcements for specific event details.

Q: Can I save and share decoded SSTV images?

A: Yes! After decoding, use the download button to save to your photo gallery, or use the share button to share directly. Shared images include a "Generated by Ham Satting" watermark.