PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-13:27:30
G07     53.0           68.1                6.5 +/-    0.73       6.9 +/-    0.73  0.030 / 0.040
G08     55.2           44.3                6.1 +/-    0.68       8.3 +/-    0.68  0.040 / 0.030
G09     179.3          41.6               10.2 +/-    1.29      14.5 +/-    1.29  0.170 / 0.310
G11     122.1          33.8                8.6 +/-    0.70      13.9 +/-    0.70  0.230 / 0.420
G18     106.1          14.7                7.7 +/-    2.00      19.4 +/-    2.00  0.060 / 0.090
G27     38.0           11.2                6.6 +/-    1.70      18.0 +/-    1.70  0.060 / 0.070
G28     264.8          45.9                7.7 +/-    1.33      10.2 +/-    1.33  0.050 / 0.120
G30     331.0          59.3                5.7 +/-    0.72       6.5 +/-    0.72  0.050 / 0.120