PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-13:27:50
G01     96.9           29.1                7.5 +/-    0.93      13.3 +/-    0.93  0.040 / 0.040
G07     119.4          47.6                7.7 +/-    0.39      10.0 +/-    0.39  0.040 / 0.050
G08     41.8           15.8                6.5 +/-    3.28      16.0 +/-    3.28  0.050 / 0.070
G11     76.8           42.8                7.0 +/-    1.11       9.8 +/-    1.11  0.050 / 0.060
G13     301.2          34.5                5.4 +/-    0.81       8.6 +/-    0.81  0.050 / 0.060
G17     209.7          43.3                7.9 +/-    0.65      10.9 +/-    0.65  0.040 / 0.060
G18     69.9           24.4                7.1 +/-    0.80      14.0 +/-    0.80  0.120 / 0.180
G19     210.8          22.1                5.6 +/-    0.80      11.8 +/-    0.80  0.120 / 0.190
G28     322.2          60.4                5.5 +/-    0.81       6.2 +/-    0.81  0.130 / 0.300
G30     77.7           79.0                7.5 +/-    0.92       7.6 +/-    0.92  0.120 / 0.240