PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-18:27:50
G01     319.6          16.2                7.5 +/-    1.80      18.1 +/-    1.80  0.040 / 0.030
G08     259.8          14.1                8.4 +/-    1.27      21.3 +/-    1.27  0.040 / 0.030
G10     76.0           54.8                9.1 +/-    0.47      10.8 +/-    0.47  0.050 / 0.060
G11     305.8          21.4                8.4 +/-    1.47      17.9 +/-    1.47  0.040 / 0.050
G14     290.4          70.0                8.6 +/-    0.59       9.1 +/-    0.59  0.030 / 0.020
G18     100.9          28.7                9.9 +/-    0.95      17.8 +/-    0.95  0.030 / 0.020
G31     177.5          38.9                9.5 +/-    1.03      14.0 +/-    1.03  0.040 / 0.030
G32     2.0            69.1                8.6 +/-    0.38       9.1 +/-    0.38  0.040 / 0.040