PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-01:12:40
G01     80.4           33.2                6.1 +/-    1.05      10.0 +/-    1.05  0.050 / 0.040
G07     132.2          38.5                9.0 +/-    0.55      13.4 +/-    0.55  0.030 / 0.050
G11     62.6           37.8                5.5 +/-    0.82       8.3 +/-    0.82  0.070 / 0.040
G13     285.6          37.2                5.6 +/-    0.45       8.5 +/-    0.45  0.070 / 0.070
G15     308.7          13.7                4.6 +/-    2.00      11.7 +/-    2.00  0.070 / 0.080
G17     222.2          59.9                7.3 +/-    2.06       8.3 +/-    2.06  0.060 / 0.080
G19     218.9          35.0                9.8 +/-    1.39      15.6 +/-    1.39  0.070 / 0.100
G28     6.3            60.7                5.7 +/-    1.37       6.5 +/-    1.37  0.080 / 0.090
G30     125.8          64.8                8.5 +/-    0.45       9.3 +/-    0.45  0.050 / 0.070