PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-13:27:50
G01     99.0           28.3                6.6 +/-    0.96      11.9 +/-    0.96  0.030 / 0.050
G07     117.4          49.2                7.0 +/-    0.55       9.0 +/-    0.55  0.030 / 0.050
G08     41.8           17.3                5.4 +/-    3.41      12.6 +/-    3.41  0.040 / 0.060
G11     79.3           43.2                6.4 +/-    1.72       8.9 +/-    1.72  0.050 / 0.060
G13     303.1          33.6                5.9 +/-    1.10       9.6 +/-    1.10  0.040 / 0.080
G17     208.7          41.4                8.3 +/-    0.64      11.8 +/-    0.64  0.060 / 0.070
G19     210.2          20.4                2.2 +/-    9.97       4.8 +/-    9.97  0.080 / 0.180
G28     318.6          60.0                5.2 +/-    0.95       5.9 +/-    0.95  0.090 / 0.130
G30     67.3           79.4                6.7 +/-    0.41       6.8 +/-    0.41  0.130 / 0.200