PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/25-13:58:00
G01     66.8           31.8                6.2 +/-    1.02      10.4 +/-    1.02  0.040 / 0.050
G07     138.3          25.4                7.5 +/-    0.98      14.5 +/-    0.98  0.040 / 0.040
G11     51.7           29.7                7.3 +/-    0.91      12.9 +/-    0.91  0.080 / 0.140
G13     270.0          38.1                9.1 +/-    3.36      13.7 +/-    3.36  0.060 / 0.130
G15     300.3          15.6                5.1 +/-    1.78      12.5 +/-    1.78  0.040 / 0.030
G17     234.5          67.7                9.6 +/-    0.59      10.3 +/-    0.59  0.030 / 0.040
G18     46.2           16.4                6.0 +/-    2.64      14.3 +/-    2.64  0.120 / 0.110
G19     225.2          45.8               10.2 +/-    2.31      13.5 +/-    2.31  0.130 / 0.110
G28     11.7           60.7                8.7 +/-    1.92       9.9 +/-    1.92  0.090 / 0.200
G30     138.2          58.6                8.8 +/-    0.33      10.1 +/-    0.33  0.150 / 0.330