PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-19:13:10
G01     128.5          10.6                2.2 +/-   46.60       6.0 +/-   46.60  0.160 / 0.290
G07     45.6           69.9               13.0 +/-    0.59      13.7 +/-    0.59  0.120 / 0.260
G08     54.2           44.3               11.7 +/-    0.80      16.0 +/-    0.80  0.180 / 0.210
G09     178.9          38.6               13.9 +/-    1.00      20.7 +/-    1.00  0.060 / 0.050
G11     122.1          33.9               15.0 +/-    1.22      24.3 +/-    1.22  0.240 / 0.410
G18     106.0          15.7               15.2 +/-    2.71      37.2 +/-    2.71  0.200 / 0.360
G28     274.0          52.2               12.0 +/-    2.69      14.8 +/-    2.69  0.030 / 0.040
G30     333.3          60.4               11.2 +/-    0.47      12.7 +/-    0.47  0.040 / 0.030