PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-12:58:10
G07     37.6           69.7                5.5 +/-    1.00       5.8 +/-    1.00  0.030 / 0.040
G08     54.1           42.6                5.6 +/-    0.88       7.8 +/-    0.88  0.040 / 0.030
G09     177.3          39.7                7.0 +/-    0.68      10.2 +/-    0.68  0.030 / 0.030
G11     122.6          32.5                5.7 +/-    0.95       9.5 +/-    0.95  0.030 / 0.030
G18     107.9          14.2                5.5 +/-    1.66      14.1 +/-    1.66  0.390 / 0.250
G23     160.3          11.4                5.4 +/-    2.34      14.6 +/-    2.34  0.310 / 0.360
G27     38.1           11.2                5.4 +/-    4.02      14.6 +/-    4.02  0.180 / 0.300
G28     268.8          50.1                6.8 +/-    3.39       8.5 +/-    3.39  0.210 / 0.440
G30     326.6          55.8                5.3 +/-    0.29       6.3 +/-    0.29  0.180 / 0.310