PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-04:42:30
G01     88.3           32.1                5.6 +/-    1.61       9.4 +/-    1.61  0.050 / 0.050
G07     127.2          41.9                7.8 +/-    0.47      11.0 +/-    0.47  0.050 / 0.060
G11     65.0           38.2                5.5 +/-    1.24       8.3 +/-    1.24  0.040 / 0.050
G13     292.4          36.9                7.3 +/-    2.23      11.2 +/-    2.23  0.040 / 0.050
G17     214.7          58.1                7.2 +/-    0.67       8.3 +/-    0.67  0.020 / 0.020
G19     215.2          26.4                5.7 +/-    1.44      10.8 +/-    1.44  0.030 / 0.020
G28     347.5          61.7                5.5 +/-    0.61       6.1 +/-    0.61  0.080 / 0.110
G30     106.9          76.5                6.6 +/-    0.60       6.8 +/-    0.60  0.080 / 0.090