PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-20:42:40
G01     115.2          20.8               19.9 +/-    2.26      42.9 +/-    2.26  0.100 / 0.060
G07     90.5           64.5               17.7 +/-    0.38      19.4 +/-    0.38  0.050 / 0.070
G08     44.5           31.8               13.4 +/-    1.27      22.6 +/-    1.27  0.150 / 0.190
G09     176.9          22.2               20.7 +/-    1.61      43.2 +/-    1.61  0.190 / 0.210
G11     103.5          41.6               18.9 +/-    0.60      26.8 +/-    0.60  0.030 / 0.040
G13     315.6          22.4               15.1 +/-    1.54      31.4 +/-    1.54  0.040 / 0.030
G17     204.2          25.2               22.2 +/-    3.41      43.1 +/-    3.41  0.150 / 0.180
G18     90.2           22.4               14.3 +/-    1.88      29.7 +/-    1.88  0.110 / 0.160
G28     302.0          59.1               16.8 +/-    0.98      19.2 +/-    0.98  0.020 / 0.030
G30     2.7            73.5               17.9 +/-    0.56      18.6 +/-    0.56  0.030 / 0.030