PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-14:27:30
G02     202.7          30.2               12.5 +/-    1.36      21.8 +/-    1.36  0.040 / 0.040
G03     62.0           9.7                 6.8 +/-    0.92      19.2 +/-    0.92  0.030 / 0.060
G06     165.4          65.2                8.7 +/-    0.52       9.4 +/-    0.52  0.090 / 0.240
G12     306.1          12.8                6.2 +/-    1.57      16.4 +/-    1.57  0.100 / 0.260
G17     35.9           49.4                5.6 +/-    1.61       7.1 +/-    1.61  0.170 / 0.200
G19     360.0          66.1                5.9 +/-    0.74       6.4 +/-    0.74  0.140 / 0.190
G24     302.8          35.3                6.2 +/-    1.17       9.8 +/-    1.17  0.080 / 0.140
G28     100.0          32.7                6.2 +/-    0.91      10.4 +/-    0.91  0.060 / 0.130