PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-09:58:00
G07     319.1          53.3                4.0 +/-    0.69       4.8 +/-    0.69  0.260 / 0.470
G08     124.5          44.9                6.5 +/-    0.80       8.8 +/-    0.80  0.220 / 0.260
G09     265.4          82.9                2.5 +/-    0.78       2.5 +/-    0.78  0.030 / 0.060
G16     43.3           17.6                0.9 +/-    4.24       2.1 +/-    4.24  0.030 / 0.050
G23     148.0          52.0                5.8 +/-    0.85       7.1 +/-    0.85  0.060 / 0.070
G27     71.2           36.8                4.9 +/-    1.54       7.5 +/-    1.54  0.060 / 0.060
G28     227.0          12.7                2.0 +/-    9.68       5.3 +/-    9.68  0.030 / 0.020
G30     291.7          27.2                4.3 +/-    2.66       8.0 +/-    2.66  0.030 / 0.030