PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-13:42:40
G10     262.0          35.7                3.3 +/-    0.99       5.2 +/-    0.99  0.040 / 0.050
G13     44.3           21.5                1.8 +/-    0.80       3.7 +/-    0.80  0.040 / 0.050
G15     65.8           52.8                2.5 +/-    0.47       3.0 +/-    0.47  0.090 / 0.320
G16     286.0          13.3                3.0 +/-    1.92       7.8 +/-    1.92  0.080 / 0.300
G20     288.9          58.1                4.3 +/-    1.14       5.0 +/-    1.14  0.080 / 0.230
G21     3.4            70.6                2.3 +/-    0.95       2.5 +/-    0.95  0.070 / 0.250
G24     120.8          11.8                6.1 +/-    1.80      16.4 +/-    1.80  0.070 / 0.070
G26     260.4          10.1                1.7 +/-    2.11       4.6 +/-    2.11  0.080 / 0.080
G27     321.6          12.5                2.3 +/-    4.14       6.2 +/-    4.14  0.150 / 0.250
G29     165.8          34.4                4.9 +/-    1.45       7.8 +/-    1.45  0.130 / 0.170