Right there is something that I think the terminology is all messed up on. Nozzle Inches per Hour does NOT mean how much water is produced by each nozzle (as it says). It means how much water is applied to your lawn (by the nozzles). For Rachio to ask how much water each nozzle puts out, it would then need to know the area each nozzle waters, and as you say, 360/180/90 degrees. I very much dislike that terminology. A recent long post complaining about the complexity mentioned that we should just put in the type of nozzle we have, and Rachio would use it. But again, that’s not the meaning. (And even if it were, most nozzles can be “throttled” to put out more or less water, to determine the distance the water travels.)
IMHO, Nozzle Inches per Hour should be called “Inches of Water Applied per Hour”. There are two ways of doing that: 1) Measure actual water used for a given period of time, measure the square feet covered, and calculate the average inches per hour - that’s what I’ve done so far. 2) Use catch cups for a given time to calculate average inches per hour and Efficiency. More time consuming, but MUCH more accurate.
If you’re interested, I’ve made a spreadsheet specifically for using 12 of the Orbit catch cups, which calculates average water inches per hour (to input into “Nozzle inches per hour” in Rachio) and Efficiency. Apparently I can’t upload an Excel file here, but if you PM me your email, I’ll send it to you.