PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-00:12:40
G01     109.3          24.4               10.3 +/-    1.26      20.4 +/-    1.26  0.050 / 0.050
G07     102.8          60.2                9.2 +/-    0.91      10.4 +/-    0.91  0.030 / 0.040
G08     42.6           24.5                7.7 +/-    2.07      15.2 +/-    2.07  0.080 / 0.120
G09     176.0          16.6               10.3 +/-    2.08      24.5 +/-    2.08  0.090 / 0.140
G11     96.1           43.2               10.9 +/-    0.52      15.0 +/-    0.52  0.100 / 0.200
G13     311.9          26.5                6.8 +/-    2.24      12.8 +/-    2.24  0.060 / 0.090
G17     205.5          33.9               11.0 +/-    1.63      17.8 +/-    1.63  0.090 / 0.090
G19     208.5          11.2               -1.8 +/-    8.02      -5.0 +/-    8.02  0.090 / 0.070
G28     314.6          60.7                6.9 +/-    0.90       7.8 +/-    0.90  0.040 / 0.040
G30     34.7           77.4                8.8 +/-    0.34       9.0 +/-    0.34  0.030 / 0.030