PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-14:13:10
G01     78.3           33.2                6.6 +/-    1.16      10.8 +/-    1.16  0.040 / 0.030
G07     133.5          36.7                7.5 +/-    0.78      11.6 +/-    0.78  0.030 / 0.040
G11     57.9           34.1                5.3 +/-    0.99       8.6 +/-    0.99  0.080 / 0.110
G13     282.2          37.9                6.4 +/-    1.47       9.7 +/-    1.47  0.100 / 0.110
G15     310.3          12.0                4.7 +/-    1.38      12.5 +/-    1.38  0.050 / 0.130
G17     224.0          64.0                8.3 +/-    1.03       9.2 +/-    1.03  0.050 / 0.120
G18     53.9           20.7                4.9 +/-    2.12      10.7 +/-    2.12  0.040 / 0.050
G19     219.9          33.1                6.8 +/-    1.87      11.2 +/-    1.87  0.030 / 0.050
G28     7.9            60.6                6.1 +/-    0.63       6.9 +/-    0.63  0.050 / 0.100
G30     127.0          69.1                6.0 +/-    1.11       6.4 +/-    1.11  0.040 / 0.070