PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-04:12:40
G01     121.4          16.2                4.8 +/-    1.61      11.7 +/-    1.61  0.040 / 0.070
G07     74.0           67.3                4.1 +/-    0.44       4.4 +/-    0.44  0.040 / 0.060
G08     46.2           33.7                3.5 +/-    0.54       5.6 +/-    0.54  0.030 / 0.040
G09     177.7          29.3                5.4 +/-    1.95       9.6 +/-    1.95  0.030 / 0.050
G11     111.0          38.2                5.6 +/-    0.85       8.3 +/-    0.85  0.040 / 0.130
G13     319.4          16.1                2.8 +/-    1.70       6.9 +/-    1.70  0.050 / 0.130
G17     200.9          22.6                5.5 +/-    1.81      11.4 +/-    1.81  0.070 / 0.150
G28     289.1          56.7                5.9 +/-    0.72       7.0 +/-    0.72  0.110 / 0.110
G30     346.1          67.5                2.5 +/-    0.74       2.7 +/-    0.74  0.040 / 0.070