PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-20:27:40
G02     2.3            73.0                9.5 +/-    0.53       9.9 +/-    0.53  0.030 / 0.030
G05     162.4          42.3               13.4 +/-    1.33      18.8 +/-    1.33  0.030 / 0.080
G06     45.6           30.0              -14.1 +/-    7.59     -24.7 +/-    7.59  0.030 / 0.020
G12     264.3          80.2               10.7 +/-    1.30      10.8 +/-    1.30  0.030 / 0.020
G19     86.2           18.9              -42.8 +/-   22.69     -96.8 +/-   22.69  0.070 / 0.070
G20     197.1          10.4               -6.5 +/-   11.12     -17.9 +/-   11.12  0.050 / 0.080
G24     221.7          15.6               14.7 +/-    3.03      35.9 +/-    3.03  0.260 / 0.210
G25     312.3          43.8               10.4 +/-    1.03      14.3 +/-    1.03  0.130 / 0.200
G29     295.1          16.8               11.2 +/-    4.52      26.6 +/-    4.52  0.060 / 0.040