PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-04:42:50
G01     55.5           28.6                5.6 +/-    0.85      10.1 +/-    0.85  0.060 / 0.160
G06     180.2          17.4                7.5 +/-    2.13      17.5 +/-    2.13  0.090 / 0.150
G07     143.7          15.8                7.9 +/-    1.43      19.3 +/-    1.43  0.040 / 0.060
G11     45.7           18.7                4.6 +/-    0.75      10.4 +/-    0.75  0.040 / 0.050
G13     256.6          33.8                4.5 +/-    1.60       7.4 +/-    1.60  0.090 / 0.120
G15     290.6          15.9                0.8 +/-    2.15       2.0 +/-    2.15  0.080 / 0.200
G17     293.5          80.2                7.6 +/-    0.71       7.7 +/-    0.71  0.060 / 0.120
G19     236.7          52.8                7.4 +/-    1.88       9.0 +/-    1.88  0.070 / 0.150
G28     39.3           56.5                6.6 +/-    0.72       7.7 +/-    0.72  0.050 / 0.040
G30     146.9          49.0               11.3 +/-    0.88      14.4 +/-    0.88  0.040 / 0.060