PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-18:42:50
G01     88.8           31.6               11.8 +/-    1.20      20.1 +/-    1.20  0.030 / 0.030
G07     126.9          38.4               13.3 +/-    0.67      19.8 +/-    0.67  0.030 / 0.030
G11     66.5           39.4               10.9 +/-    1.39      16.0 +/-    1.39  0.040 / 0.070
G13     293.2          37.1               10.7 +/-    3.02      16.4 +/-    3.02  0.040 / 0.070
G15     314.3          10.7               -3.5 +/-   23.99      -9.6 +/-   23.99  0.060 / 0.050
G17     214.0          54.3               14.7 +/-    0.96      17.6 +/-    0.96  0.060 / 0.060
G18     61.2           22.9               10.2 +/-    1.86      20.9 +/-    1.86  0.060 / 0.110
G19     214.2          28.1               13.5 +/-    1.85      24.5 +/-    1.85  0.080 / 0.120
G28     339.9          61.6               10.4 +/-    0.87      11.7 +/-    0.87  0.090 / 0.200
G30     110.2          73.4               13.6 +/-    1.03      14.1 +/-    1.03  0.110 / 0.170