I'm still not quite sure what to use it on, but I'm pretty sure the 0=0A=10BABYA=36 is a character mapping.
0=0
A=10
BabyA=36. Morse code has no lowercase, so she called the lowercase 'a' BabyA.
This also jives with the background story for Wow!.jpg. The numbers/letters are intensities:
The circled alphanumeric code 6EQUJ5 describes the intensity variation of the signal. A space denotes an intensity between 0 and 1, the numbers 1 to 9 denote the correspondingly numbered intensities (from 1.0 to 10.0), and intensities of 10.0 and above are denoted by a letter ('A' corresponds to intensities between 10.0 and 11.0, 'B' to 11.0 to 12.0, etc.). The value 'U' (an intensity between 30.0 and 31.0) was the highest detected by the radio telescope; on a linear scale it was over 30 times louder than normal deep space.
I'm getting obsessed with this above. We haven't used this clue anywhere, and it may be saying to us:
"Use some string and replace
0 with 0
A with 10
a with 36
and then use it as a passphrase to get the key."
Problem is I don't get what "replace 0 with 0" can mean? What's the point of replacing something with itself?