PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-09:57:40
G01     72.1           32.3                5.9 +/-    1.17       9.9 +/-    1.17  0.050 / 0.080
G07     135.5          31.7                6.8 +/-    0.81      11.5 +/-    0.81  0.060 / 0.090
G11     55.9           34.3                5.5 +/-    1.81       8.8 +/-    1.81  0.040 / 0.050
G13     276.4          38.9                6.8 +/-    1.34      10.1 +/-    1.34  0.070 / 0.030
G15     305.1          14.4                2.6 +/-    1.58       6.6 +/-    1.58  0.090 / 0.090
G17     226.9          64.6                8.9 +/-    0.80       9.7 +/-    0.80  0.090 / 0.090
G18     50.3           19.2                4.4 +/-    1.55       9.8 +/-    1.55  0.090 / 0.150
G19     221.3          41.7                8.7 +/-    1.28      12.4 +/-    1.28  0.090 / 0.260
G28     359.8          61.4                5.4 +/-    0.77       6.1 +/-    0.77  0.030 / 0.030
G30     132.8          66.2                7.6 +/-    0.99       8.3 +/-    0.99  0.030 / 0.030