PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-04:42:50
G01     76.7           33.2                4.4 +/-    0.82       7.1 +/-    0.82  0.060 / 0.090
G07     134.2          33.2                7.3 +/-    1.43      11.9 +/-    1.43  0.040 / 0.110
G11     56.1           32.8                1.2 +/-    0.84       1.9 +/-    0.84  0.070 / 0.090
G13     280.4          38.3                3.4 +/-    0.93       5.1 +/-    0.93  0.060 / 0.110
G15     308.0          13.2                1.7 +/-    1.82       4.4 +/-    1.82  0.070 / 0.110
G17     225.3          67.5                5.7 +/-    0.49       6.1 +/-    0.49  0.060 / 0.100
G18     50.3           18.3                1.6 +/-    1.52       3.7 +/-    1.52  0.070 / 0.170
G19     220.3          35.3                4.2 +/-    1.01       6.7 +/-    1.01  0.070 / 0.170
G28     5.9            60.9                2.9 +/-    0.58       3.3 +/-    0.58  0.030 / 0.030
G30     129.1          68.2                4.4 +/-    0.45       4.7 +/-    0.45  0.030 / 0.040