PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-18:28:10
G02     213.5          52.1               16.1 +/-    1.22      19.8 +/-    1.22  0.090 / 0.100
G06     70.5           77.1               12.7 +/-    0.91      13.0 +/-    0.91  0.060 / 0.080
G12     317.8          33.7               11.5 +/-    1.99      18.7 +/-    1.99  0.040 / 0.070
G17     56.2           32.5                9.2 +/-    0.64      15.4 +/-    0.64  0.040 / 0.080
G19     37.7           50.1                9.8 +/-    0.80      12.4 +/-    0.80  0.060 / 0.080
G24     273.3          42.0               10.3 +/-    1.08      14.5 +/-    1.08  0.060 / 0.080
G28     120.4          16.2                9.7 +/-    1.17      23.3 +/-    1.17  0.050 / 0.060