Gabriel Zeifman wrote:
It's not complicated. However much it may be insisted ISS packet is not SO-50, it is practically the same thing (single channel operating on FM).
Actually, the ISS digi is worse.
With voice communication, one can sometimes pick up the start or tail of a call sign, as the astronaut demonstrated, and use that to filter a second try. With digital, any bits that get corrupted result in no reception at all.
I hate to suggest this, and admit I am assuming a cause without supporting evidence, but it might be necessary to remove the "vanity" aspect of ISS digipeating, and take down or hide from general view the reporting sites that support it. While a useful tool for troubleshooting, I suspect the vanity aspect of seeing your call in a public list day after day from an unattended station may be too strong a draw for some, resulting in the clogged channel. The SatGates that monitor for ISS and other APRS satellite traffic are still important part of the infrastructure, so that the information can be datamined from APRS-IS if you need it for troubleshooting. But the consolidated lists of who has been seen digipeating through the ISS, I think, may be contributing more trouble than they are worth.
Greg KO6TH