PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-05:57:40
G02     19.9           66.6                2.0 +/-    0.95       2.1 +/-    0.95  0.050 / 0.090
G05     155.1          48.0                6.6 +/-    0.86       8.5 +/-    0.86  0.050 / 0.080
G06     45.7           30.1                2.0 +/-    0.82       3.4 +/-    0.82  0.040 / 0.060
G12     263.4          79.1                3.8 +/-    1.22       3.8 +/-    1.22  0.030 / 0.050
G19     87.3           19.1                4.7 +/-    1.02      10.6 +/-    1.02  0.030 / 0.030
G24     219.3          13.6                4.1 +/-    1.69      10.5 +/-    1.69  0.030 / 0.030
G25     312.9          40.4                2.6 +/-    1.98       3.8 +/-    1.98  0.130 / 0.390
G29     296.6          18.0                2.4 +/-    1.30       5.6 +/-    1.30  0.120 / 0.300