PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-16:58:10
G07     8.8            67.3               11.8 +/-    0.59      12.7 +/-    0.59  0.030 / 0.050
G08     68.8           51.0               12.3 +/-    0.40      15.4 +/-    0.40  0.040 / 0.050
G09     180.4          52.2               16.0 +/-    2.54      19.7 +/-    2.54  0.080 / 0.200
G11     132.9          25.7               13.0 +/-    1.26      24.9 +/-    1.26  0.080 / 0.180
G23     158.4          17.8               10.8 +/-    1.83      25.1 +/-    1.83  0.040 / 0.040
G27     41.3           18.6                9.8 +/-    0.91      22.2 +/-    0.91  0.030 / 0.040
G28     256.4          44.2               11.5 +/-    1.52      15.7 +/-    1.52  0.050 / 0.060
G30     318.9          49.5               11.1 +/-    0.50      14.1 +/-    0.50  0.040 / 0.060