PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-04:57:50
G01     42.2           17.9                2.9 +/-    3.84       6.7 +/-    3.84  0.060 / 0.080
G06     175.1          33.6                5.9 +/-    1.07       9.6 +/-    1.07  0.100 / 0.070
G11     44.1           12.1                2.6 +/-    3.33       6.9 +/-    3.33  0.090 / 0.240
G13     240.2          26.0                5.4 +/-    1.53      10.4 +/-    1.53  0.110 / 0.250
G15     271.9          14.1                3.0 +/-    2.46       7.7 +/-    2.46  0.290 / 0.230
G17     353.8          73.9                6.5 +/-    0.81       6.7 +/-    0.81  0.230 / 0.290
G19     266.2          68.7                5.8 +/-    0.88       6.1 +/-    0.88  0.040 / 0.040
G24     318.0          13.9                2.9 +/-    1.43       7.4 +/-    1.43  0.040 / 0.050
G28     53.6           55.3                5.1 +/-    1.54       6.0 +/-    1.54  0.040 / 0.030
G30     154.6          36.6                6.8 +/-    0.83      10.5 +/-    0.83  0.040 / 0.030