PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/13-13:58:00
G01     94.1           30.0               10.2 +/-    0.85      17.9 +/-    0.85  0.050 / 0.050
G07     122.0          45.3               10.7 +/-    0.85      14.4 +/-    0.85  0.040 / 0.050
G08     42.0           13.4                7.1 +/-    3.71      18.5 +/-    3.71  0.050 / 0.080
G11     73.4           42.0                9.3 +/-    0.90      13.1 +/-    0.90  0.060 / 0.070
G13     298.6          35.6                9.9 +/-    1.86      15.6 +/-    1.86  0.040 / 0.060
G17     211.1          46.2               10.0 +/-    0.87      13.2 +/-    0.87  0.050 / 0.050
G18     67.2           24.2                8.8 +/-    1.25      17.5 +/-    1.25  0.040 / 0.070
G19     211.8          24.4                9.3 +/-    1.44      18.5 +/-    1.44  0.050 / 0.070
G28     327.4          60.8                8.1 +/-    0.39       9.2 +/-    0.39  0.100 / 0.180
G30     91.2           77.6                9.6 +/-    0.32       9.8 +/-    0.32  0.180 / 0.230