PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-14:27:40
G01     318.9          18.2                4.4 +/-    1.25      10.0 +/-    1.25  0.050 / 0.060
G08     260.0          12.9                5.6 +/-    1.06      14.6 +/-    1.06  0.060 / 0.070
G10     80.1           53.4                4.7 +/-    0.45       5.7 +/-    0.45  0.160 / 0.290
G11     305.3          21.1                6.1 +/-    2.95      13.1 +/-    2.95  0.120 / 0.270
G14     293.4          69.6                5.8 +/-    0.63       6.1 +/-    0.63  0.040 / 0.060
G22     301.3          12.6                3.6 +/-    2.00       9.4 +/-    2.00  0.030 / 0.050
G31     175.1          43.4                8.5 +/-    0.95      11.8 +/-    0.95  0.040 / 0.030
G32     10.3           66.5                4.6 +/-    0.66       4.9 +/-    0.66  0.040 / 0.030