PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-06:42:30
G03     189.7          16.5                5.6 +/-    0.91      13.5 +/-    0.91  0.160 / 0.300
G07     297.1          41.6                5.3 +/-    0.93       7.5 +/-    0.93  0.130 / 0.270
G08     134.6          33.8                8.3 +/-    0.56      13.5 +/-    0.56  0.040 / 0.090
G09     319.9          75.5                4.4 +/-    0.67       4.5 +/-    0.67  0.040 / 0.080
G16     41.8           31.4                1.7 +/-    0.73       3.0 +/-    0.73  0.050 / 0.120
G23     131.6          74.8                5.3 +/-    1.13       5.5 +/-    1.13  0.060 / 0.140
G27     93.3           36.1                6.7 +/-    1.24      10.4 +/-    1.24  0.030 / 0.040
G30     277.9          15.0                5.1 +/-    2.38      12.7 +/-    2.38  0.030 / 0.040