PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-22:42:40
G07     9.6            67.3               11.4 +/-    0.70      12.2 +/-    0.70  0.040 / 0.050
G08     68.8           51.1               11.6 +/-    0.45      14.4 +/-    0.45  0.040 / 0.050
G09     181.5          53.0               12.4 +/-    2.72      15.1 +/-    2.72  0.070 / 0.080
G11     134.8          25.1               16.8 +/-    1.57      32.8 +/-    1.57  0.070 / 0.100
G23     159.3          20.1               15.4 +/-    1.42      33.8 +/-    1.42  0.090 / 0.130
G27     41.1           18.0                9.0 +/-    1.17      20.7 +/-    1.17  0.090 / 0.140
G28     257.0          44.7                9.5 +/-    1.44      12.8 +/-    1.44  0.030 / 0.040
G30     322.3          52.4               12.5 +/-    1.51      15.3 +/-    1.51  0.040 / 0.040