pyephem

Why the results differ between pyephem sublat and STK LLA?

Why the results differ between pyephem sublat and STK LLA? Question: import ephem line1 = "WorldView 4" line2 = ‘1 41848U 16067A 20074.82580014 -.00000094 00000-0 00000+0 0 9999’ line3 = "2 41848 97.8435 176.0145 0008992 126.7749 233.3766 15.40359612182266" iss = ephem.readtle(line1, line2, line3) iss.compute(‘2020/3/15 04:00:00.000’) issE = iss.elevation.real/1000 print("%s,%s,%s"%(iss.sublat,iss.sublong,issE)) ​ 82:05:50.5,-140:07:20.6,453.627375 but in STK LLA …

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