PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-19:57:50
G07     7.6            67.1               11.9 +/-    0.58      12.8 +/-    0.58  0.040 / 0.040
G08     72.5           52.9               12.1 +/-    0.66      14.7 +/-    0.66  0.040 / 0.030
G09     181.4          53.5               14.0 +/-    0.69      17.0 +/-    0.69  0.080 / 0.210
G11     134.5          25.0               16.8 +/-    4.04      32.8 +/-    4.04  0.090 / 0.180
G23     158.6          18.9               14.0 +/-    0.87      31.7 +/-    0.87  0.040 / 0.050
G27     41.4           18.7                9.6 +/-    2.86      21.8 +/-    2.86  0.040 / 0.040
G28     256.1          44.1               14.4 +/-    4.19      19.6 +/-    4.19  0.030 / 0.040
G30     320.0          50.5               11.9 +/-    0.60      14.9 +/-    0.60  0.030 / 0.030