PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-05:12:50
G01     71.4           32.9                3.4 +/-    1.28       5.6 +/-    1.28  0.190 / 0.330
G07     136.9          29.3                7.6 +/-    1.01      13.5 +/-    1.01  0.160 / 0.330
G11     52.8           29.8                5.0 +/-    1.79       8.8 +/-    1.79  0.070 / 0.100
G13     274.6          38.0                5.6 +/-    1.27       8.4 +/-    1.27  0.070 / 0.090
G15     304.4          14.3                1.2 +/-    0.99       3.2 +/-    0.99  0.040 / 0.060
G17     233.1          71.6                6.4 +/-    0.61       6.7 +/-    0.61  0.040 / 0.050
G18     46.9           16.3                3.1 +/-    2.92       7.4 +/-    2.92  0.030 / 0.030
G19     223.3          39.3                6.8 +/-    1.54      10.0 +/-    1.54  0.030 / 0.040
G28     14.4           60.1                5.4 +/-    0.90       6.1 +/-    0.90  0.050 / 0.070
G30     135.1          64.0                7.5 +/-    0.43       8.2 +/-    0.43  0.050 / 0.080