PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-17:12:40
G01     39.1           12.5                9.2 +/-    2.23      24.2 +/-    2.23  0.100 / 0.300
G06     173.4          44.6               16.5 +/-    0.77      22.4 +/-    0.77  0.150 / 0.330
G13     235.6          19.1               15.2 +/-    5.15      34.2 +/-    5.15  0.520 / 0.460
G15     270.4          10.7               12.3 +/-    1.42      33.8 +/-    1.42  0.400 / 0.460
G17     15.2           65.0               13.2 +/-    0.64      14.4 +/-    0.64  0.080 / 0.120
G19     299.0          72.1               14.4 +/-    1.03      15.0 +/-    1.03  0.080 / 0.130
G24     315.7          21.4               10.9 +/-    2.93      23.1 +/-    2.93  0.170 / 0.230
G28     77.8           44.4               14.4 +/-    1.44      19.6 +/-    1.44  0.140 / 0.310
G30     156.2          25.2               14.0 +/-    2.37      27.3 +/-    2.37  0.030 / 0.020