PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-23:58:10
G02     199.4          19.3               14.8 +/-    1.42      33.2 +/-    1.42  0.180 / 0.350
G06     172.3          50.5               13.9 +/-    0.66      17.4 +/-    0.66  0.190 / 0.330
G13     229.8          15.0               15.2 +/-    1.66      37.9 +/-    1.66  0.030 / 0.030
G17     10.9           65.1               11.2 +/-    0.59      12.2 +/-    0.59  0.040 / 0.030
G19     310.9          71.2               11.8 +/-    0.50      12.3 +/-    0.50  0.040 / 0.040
G24     312.0          27.2               11.5 +/-    1.55      21.4 +/-    1.55  0.040 / 0.040
G28     85.0           41.0               12.3 +/-    0.88      17.6 +/-    0.88  0.040 / 0.060
G30     156.1          15.5               14.8 +/-    2.88      36.3 +/-    2.88  0.050 / 0.070