PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-06:57:20
G10     268.2          39.8                6.8 +/-    1.12      10.0 +/-    1.12  0.040 / 0.040
G13     41.3           17.0                3.4 +/-    2.02       8.1 +/-    2.02  0.040 / 0.030
G15     57.4           47.0                4.6 +/-    0.80       6.0 +/-    0.80  0.220 / 0.210
G16     282.7          11.5                5.7 +/-    2.30      15.4 +/-    2.30  0.200 / 0.250
G20     299.8          60.8                5.0 +/-    0.57       5.6 +/-    0.57  0.200 / 0.400
G21     12.4           72.9                5.6 +/-    0.61       5.8 +/-    0.61  0.180 / 0.380
G24     118.7          14.8                5.7 +/-    1.87      14.4 +/-    1.87  0.080 / 0.080
G27     319.1          18.0                3.7 +/-    2.11       8.6 +/-    2.11  0.070 / 0.070
G29     165.3          26.1                6.0 +/-    0.92      11.4 +/-    0.92  0.110 / 0.140