PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-01:57:40
G01     121.1          14.2                7.6 +/-    2.55      19.4 +/-    2.55  0.040 / 0.030
G07     64.3           69.0                5.3 +/-    0.68       5.6 +/-    0.68  0.030 / 0.030
G08     47.1           34.7                4.5 +/-    1.09       7.1 +/-    1.09  0.060 / 0.120
G09     173.7          27.2                5.3 +/-    2.21       9.8 +/-    2.21  0.050 / 0.060
G11     119.1          38.7                8.6 +/-    0.70      12.8 +/-    0.70  0.090 / 0.150
G13     319.3          16.5                3.9 +/-    4.30       9.4 +/-    4.30  0.090 / 0.150
G17     199.4          19.6                5.8 +/-    2.18      13.0 +/-    2.18  0.080 / 0.120
G28     272.6          47.9                5.9 +/-    2.60       7.6 +/-    2.60  0.060 / 0.110
G30     331.4          60.7                4.3 +/-    0.59       4.9 +/-    0.59  0.090 / 0.090