PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-18:27:20
G02     203.1          31.7               13.2 +/-    2.20      22.4 +/-    2.20  0.170 / 0.240
G06     158.1          68.3               10.9 +/-    0.36      11.7 +/-    0.36  0.120 / 0.290
G12     307.4          16.3                8.7 +/-    2.34      21.0 +/-    2.34  0.040 / 0.030
G17     33.6           51.2                9.7 +/-    1.01      12.1 +/-    1.01  0.030 / 0.020
G19     350.1          67.2                9.7 +/-    0.40      10.5 +/-    0.40  0.110 / 0.090
G24     299.0          37.9               11.0 +/-    1.59      16.6 +/-    1.59  0.060 / 0.120
G28     100.7          32.4                9.3 +/-    1.23      15.6 +/-    1.23  0.040 / 0.040