SUBSIM Radio Room Forums - View Single Post - Celestial Navigation with RFB / TMO mods?

Sean C · 07-13-17, 09:08 AM

DaveR,

I'd be happy to help you figure this out, but first I need to know a few details:

What, exactly, are you trying to accomplish? Are you trying to figure out the time of Sun/Moon rise/set at Midway or at your ship's actual position or are you trying to find the position of your ship?
Are you able to measure the altitude of the Sun/Moon in game? If so, is the measurement at the lower limb, center or upper limb? What precision can be achieved? (Ideally, you want to be able to measure the altitude to within one tenth of an arc-minute. E.g. 37°12.8'.)
Where are you getting your almanac data? The times you listed for moon rise/set match the Nautical Almanac times for those dates at 30°N. But, the sunrise/set times are a little off.
Is your ship's clock set to Midway time, as I assume it is from reading aanker's post?
Is your ship actually at Midway or some other location? (Still 140°30'W?) What is your DR latitude? Are you underway or stationary?

07-13-17, 09:08 AM	#34
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 908 Downloads: 12 Uploads: 2	DaveR, I'd be happy to help you figure this out, but first I need to know a few details: What, exactly, are you trying to accomplish? Are you trying to figure out the time of Sun/Moon rise/set at Midway or at your ship's actual position or are you trying to find the position of your ship? Are you able to measure the altitude of the Sun/Moon in game? If so, is the measurement at the lower limb, center or upper limb? What precision can be achieved? (Ideally, you want to be able to measure the altitude to within one tenth of an arc-minute. E.g. 37°12.8'.) Where are you getting your almanac data? The times you listed for moon rise/set match the Nautical Almanac times for those dates at 30°N. But, the sunrise/set times are a little off. Is your ship's clock set to Midway time, as I assume it is from reading aanker's post? Is your ship actually at Midway or some other location? (Still 140°30'W?) What is your DR latitude? Are you underway or stationary?