PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-11:12:40
G03     188.1          16.2                4.3 +/-    1.91      10.4 +/-    1.91  0.050 / 0.080
G07     298.4          44.1                5.0 +/-    1.00       6.8 +/-    1.00  0.050 / 0.070
G08     140.0          31.0                5.6 +/-    1.25       9.7 +/-    1.25  0.040 / 0.040
G09     319.0          66.6                3.0 +/-    1.36       3.2 +/-    1.36  0.040 / 0.040
G16     42.4           34.6                3.0 +/-    0.83       4.8 +/-    0.83  0.060 / 0.080
G23     129.7          71.4                6.5 +/-    0.72       6.8 +/-    0.72  0.070 / 0.090
G27     95.1           35.3                4.8 +/-    0.76       7.6 +/-    0.76  0.030 / 0.040
G30     278.2          17.4                6.4 +/-    1.90      14.9 +/-    1.90  0.040 / 0.030