PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-12:43:10
G07     0.2            65.2                5.5 +/-    0.71       5.9 +/-    0.71  0.130 / 0.170
G08     84.2           53.2                5.9 +/-    0.70       7.2 +/-    0.70  0.090 / 0.140
G09     184.3          63.7                7.3 +/-    0.49       8.1 +/-    0.49  0.210 / 0.330
G11     138.7          20.7                5.8 +/-    1.69      12.6 +/-    1.69  0.130 / 0.260
G23     157.1          28.1                6.0 +/-    0.71      10.9 +/-    0.71  0.040 / 0.040
G27     47.4           26.3                4.4 +/-    1.85       8.3 +/-    1.85  0.040 / 0.030
G28     243.6          32.0                5.3 +/-    1.62       8.9 +/-    1.62  0.070 / 0.150
G30     311.7          44.1                5.1 +/-    0.95       6.9 +/-    0.95  0.200 / 0.130