PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-15:28:00
G02     202.8          28.9               16.8 +/-    1.37      30.1 +/-    1.37  0.090 / 0.230
G03     62.7           9.7                 9.8 +/-    1.25      27.5 +/-    1.25  0.110 / 0.240
G06     165.0          64.9               14.3 +/-    0.57      15.6 +/-    0.57  0.050 / 0.090
G12     305.9          12.7               12.3 +/-    3.05      32.4 +/-    3.05  0.070 / 0.080
G17     35.4           49.8               11.7 +/-    1.16      14.8 +/-    1.16  0.180 / 0.200
G19     358.8          66.5               12.8 +/-    0.54      13.9 +/-    0.54  0.130 / 0.210
G24     303.4          34.9               12.7 +/-    1.30      20.2 +/-    1.30  0.040 / 0.030
G28     99.4           33.2               10.5 +/-    1.03      17.3 +/-    1.03  0.030 / 0.020