PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-21:58:00
G02     88.5           10.7               10.4 +/-    2.43      28.7 +/-    2.43  0.070 / 0.180
G05     45.3           31.0                9.2 +/-    1.27      15.9 +/-    1.27  0.080 / 0.200
G13     92.3           36.2               12.4 +/-    1.54      19.3 +/-    1.54  0.190 / 0.390
G15     139.9          43.3               15.2 +/-    1.62      21.0 +/-    1.62  0.130 / 0.350
G18     236.0          32.6               14.2 +/-    1.54      23.7 +/-    1.54  0.060 / 0.100
G20     16.5           76.6               11.2 +/-    0.62      11.5 +/-    0.62  0.050 / 0.080
G21     302.9          40.4               10.9 +/-    1.61      15.7 +/-    1.61  0.020 / 0.020
G25     201.7          17.5               17.2 +/-    3.26      40.2 +/-    3.26  0.020 / 0.020
G26     301.2          18.8                8.2 +/-    1.20      18.5 +/-    1.20  0.050 / 0.030
G29     136.2          81.5               12.0 +/-    0.24      12.1 +/-    0.24  0.040 / 0.030