PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-14:13:10
G01     231.4          21.7               11.1 +/-    1.72      23.4 +/-    1.72  0.060 / 0.140
G03     297.4          65.9                7.9 +/-    0.91       8.6 +/-    0.91  0.070 / 0.170
G14     78.9           31.3                8.4 +/-    0.69      14.3 +/-    0.69  0.080 / 0.110
G16     150.4          39.3               10.7 +/-    1.31      15.7 +/-    1.31  0.070 / 0.080
G18     208.1          11.9                6.4 +/-    2.28      17.2 +/-    2.28  0.040 / 0.050
G22     216.6          74.1               11.0 +/-    0.67      11.4 +/-    0.67  0.030 / 0.050
G23     304.9          36.6                7.2 +/-    1.19      11.1 +/-    1.19  0.080 / 0.230
G26     106.2          52.1               10.9 +/-    0.48      13.4 +/-    0.48  0.090 / 0.170
G31     43.5           36.1                7.2 +/-    0.99      11.1 +/-    0.99  0.050 / 0.080