PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-03:57:40
G01     74.3           33.1                4.4 +/-    0.98       7.2 +/-    0.98  0.040 / 0.080
G07     135.4          31.2                6.8 +/-    0.89      11.6 +/-    0.89  0.040 / 0.110
G11     54.6           31.5                2.8 +/-    0.70       4.7 +/-    0.70  0.090 / 0.130
G13     277.9          38.3                4.8 +/-    1.02       7.2 +/-    1.02  0.090 / 0.120
G15     306.0          14.0                1.1 +/-    2.54       2.7 +/-    2.54  0.050 / 0.050
G17     228.4          69.3                5.2 +/-    1.06       5.6 +/-    1.06  0.060 / 0.050
G18     48.5           17.2                1.1 +/-    1.50       2.6 +/-    1.50  0.090 / 0.210
G19     221.6          37.4                5.7 +/-    0.72       8.7 +/-    0.72  0.100 / 0.200
G28     9.2            60.7                3.1 +/-    0.77       3.5 +/-    0.77  0.040 / 0.040
G30     132.0          66.2                4.9 +/-    0.62       5.3 +/-    0.62  0.040 / 0.040