I have TLE and RINEX navigation file for GPS satellite PRN 20, for 01.04.17r. 19:56:56 and 20:00:00 respectively. See also The Receiver Independent Exchange Format Version 3.03.
It seems that the value of longitude of the ascending node (Ω0) differs for both while all the other parameters are relatively similar.
RINEX file:
M0 = -0.41907076212790001
e = 0.0044262305600569997
ω = 1.5754052384999999
i = 0.92697366533970005
Ω0 = -0.4446281969834
TLE file:
M0 = 5.8389169820721856
e = 0.0042077
ω = 1.5770882387483363
i = 0.92682044735729674
Ω0 = 2.7589292150900362
What can be the reason for this?
While the values for M0
are close modulo 2π, the values for Ω0 seem to differ by only π, or about 180°.
Checking also other datasets the result is similar, although the difference between values differs.
TLE:
GPS BIIR-4 (PRN 20)
1 26360U 00025A 17091.83120691 -.00000002 00000-0 00000-0 0 9995
2 26360 53.1029 158.0750 0042077 90.3605 334.5453 2.00565359123815
RINEX:
20 17 4 1 20 0 0.0 4.665344022214D-04 1.591615728103D-12 0.000000000000D+00
5.600000000000D+01-1.231250000000D+01 5.538802141913D-09-4.190707621279D-01
-5.606561899185D-07 4.426230560057D-03 6.150454282761D-06 5.153646507263D+03
5.904000000000D+05-6.705522537231D-08-4.446281969834D-01 3.725290298462D-08
9.269736653397D-01 2.442500000000D+02 1.575405238500D+00-8.669646839876D-09
2.714398779890D-11 0.000000000000D+00 1.942000000000D+03 0.000000000000D+00
2.000000000000D+00 0.000000000000D+00-8.381903171539D-09 5.600000000000D+01
5.899500000000D+05 4.000000000000D+00