PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-10:12:50
G01     306.7          34.3                5.5 +/-    0.68       8.9 +/-    0.68  0.060 / 0.090
G10     106.4          38.5                6.7 +/-    0.82      10.0 +/-    0.82  0.060 / 0.110
G11     280.4          28.0                4.1 +/-    1.07       7.5 +/-    1.07  0.040 / 0.060
G14     359.2          66.7                5.2 +/-    0.95       5.6 +/-    0.95  0.040 / 0.060
G18     273.9          50.9                6.4 +/-    1.18       7.9 +/-    1.18  0.080 / 0.140
G20     120.8          13.7                4.9 +/-    1.43      12.6 +/-    1.43  0.100 / 0.150
G22     311.1          30.0                4.4 +/-    1.99       7.7 +/-    1.99  0.050 / 0.060
G25     81.5           16.2                2.2 +/-    1.74       5.3 +/-    1.74  0.050 / 0.080
G31     166.8          64.8                7.1 +/-    1.49       7.8 +/-    1.49  0.120 / 0.290
G32     30.9           55.9                4.0 +/-    0.41       4.7 +/-    0.41  0.090 / 0.280