These two examples in the docs are invalid:

Trying to view those two SATs gives this error message:

Invalid URL: failed to parse sat `1°1′0″0‴`: relationship between epoch offset and period offset must be multiple of 336

Invalid URL: failed to parse sat `1°0′1″0‴`: relationship between epoch offset and period offset must be multiple of 336

The message itself is a bit confusing. What "relationship" is it talking about?

Looking at the code, the relationship it enforces is that the 2nd and 3rd numbers in degree notation must differ by a multiple of 336. So maybe this is a better error message:

difference between epoch offset and period offset must be multiple of 336

1°2016′0″0‴ (rare, epoch 6) and 1°0′336″0‴ (epic, epoch 7) would make better examples.