PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-03:12:30
G07     358.9          65.2                3.5 +/-    0.56       3.9 +/-    0.56  0.060 / 0.080
G08     74.2           51.2                4.6 +/-    1.34       5.7 +/-    1.34  0.040 / 0.100
G09     182.2          58.7                6.6 +/-    0.40       7.5 +/-    0.40  0.040 / 0.040
G11     136.6          21.8                4.7 +/-    2.16       9.9 +/-    2.16  0.030 / 0.030
G23     159.3          27.8                5.7 +/-    2.03      10.4 +/-    2.03  0.040 / 0.030
G27     43.8           21.9                3.8 +/-    2.02       7.9 +/-    2.02  0.040 / 0.040
G28     250.9          41.0                5.7 +/-    2.19       8.1 +/-    2.19  0.180 / 0.130
G30     315.0          46.3                4.3 +/-    0.65       5.7 +/-    0.65  0.170 / 0.130