PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-07:58:00
G10     250.7          26.4                6.4 +/-    2.05      12.0 +/-    2.05  0.080 / 0.640
G13     53.8           30.3                5.9 +/-    1.91      10.3 +/-    1.91  0.090 / 0.460
G15     84.3           56.8                7.9 +/-    0.85       9.3 +/-    0.85  0.040 / 0.040
G16     295.7          15.3                2.2 +/-    1.45       5.4 +/-    1.45  0.030 / 0.040
G20     17.0           66.5                3.9 +/-    0.78       4.2 +/-    0.78  0.040 / 0.040
G21     334.7          60.8                4.2 +/-    0.55       4.7 +/-    0.55  0.040 / 0.030
G26     266.9          15.6                5.7 +/-    2.96      13.9 +/-    2.96  0.040 / 0.050
G29     164.7          49.5                8.2 +/-    0.71      10.5 +/-    0.71  0.050 / 0.050