PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-19:28:10
G02     217.2          60.1               13.2 +/-    0.57      15.0 +/-    0.57  0.040 / 0.080
G06     53.8           71.9               11.8 +/-    0.73      12.4 +/-    0.73  0.040 / 0.090
G12     319.7          39.7               10.3 +/-    0.73      15.1 +/-    0.73  0.130 / 0.500
G17     57.9           32.3                8.9 +/-    0.69      14.8 +/-    0.69  0.130 / 0.450
G19     37.7           50.5                9.3 +/-    0.46      11.7 +/-    0.46  0.070 / 0.090
G24     262.6          41.5               13.1 +/-    2.03      18.6 +/-    2.03  0.070 / 0.100
G28     123.3          12.9               12.4 +/-    2.64      32.3 +/-    2.64  0.040 / 0.060