PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-01:43:00
G01     63.9           31.7                4.8 +/-    1.29       8.1 +/-    1.29  0.040 / 0.040
G06     182.3          10.5              -14.1 +/-   28.03     -38.8 +/-   28.03  0.030 / 0.040
G07     140.7          25.8                7.3 +/-    2.50      14.1 +/-    2.50  0.150 / 0.350
G11     51.5           28.7                5.2 +/-    1.95       9.3 +/-    1.95  0.020 / 0.030
G13     267.8          36.1                6.9 +/-    1.70      10.8 +/-    1.70  0.030 / 0.030
G15     296.4          16.6                5.5 +/-    1.00      13.2 +/-    1.00  0.040 / 0.090
G17     245.7          72.3                6.3 +/-    0.58       6.5 +/-    0.58  0.080 / 0.060
G19     229.4          47.9                7.5 +/-    1.91       9.7 +/-    1.91  0.050 / 0.120
G28     31.1           57.4                4.6 +/-    0.45       5.3 +/-    0.45  0.060 / 0.100
G30     140.3          51.4                7.6 +/-    0.36       9.4 +/-    0.36  0.070 / 0.120