PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/29-07:43:00
G07     315.5          51.6                4.7 +/-    0.93       5.8 +/-    0.93  0.050 / 0.060
G08     127.0          43.5                5.3 +/-    1.03       7.4 +/-    1.03  0.060 / 0.060
G09     275.1          82.9                3.3 +/-    0.59       3.3 +/-    0.59  0.050 / 0.070
G16     43.0           18.5                2.3 +/-    4.30       5.2 +/-    4.30  0.050 / 0.060
G23     147.4          55.6                6.2 +/-    0.38       7.4 +/-    0.38  0.040 / 0.030
G27     73.3           36.9                5.0 +/-    0.51       7.7 +/-    0.51  0.030 / 0.030
G30     289.6          24.8                5.2 +/-    1.14      10.1 +/-    1.14  0.210 / 0.570