With Miranda's help, I discovered some serious errors in Gem OB1 and fixed them.
- L189 was using L134 data for no apparent reason
- many September 2007 observations have the WRONG rotation angle in place in array_params! Unfortunately it's not clear yet which ones suffer from this problem: I need a list of when rotangle was/was not used, and it looks like it'll be a pain to fix the problem.
- GemOB1link wasn't mapped, it will be now.