PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-02:57:50
G02     199.3          21.1                5.6 +/-    2.12      12.1 +/-    2.12  0.040 / 0.070
G06     173.8          50.6                7.3 +/-    0.63       9.2 +/-    0.63  0.050 / 0.080
G13     229.1          14.2                5.9 +/-    1.54      15.0 +/-    1.54  0.040 / 0.040
G17     17.1           62.4                4.5 +/-    0.59       5.1 +/-    0.59  0.030 / 0.040
G19     318.7          71.3                3.6 +/-    0.48       3.8 +/-    0.48  0.040 / 0.040
G24     311.5          27.8                2.3 +/-    1.38       4.3 +/-    1.38  0.060 / 0.040
G28     86.8           40.1                4.9 +/-    0.88       7.0 +/-    0.88  0.120 / 0.360
G30     155.7          12.6                7.6 +/-    2.10      19.9 +/-    2.10  0.140 / 0.480