PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-23:43:00
G01     247.9          33.6                9.1 +/-    1.95      14.9 +/-    1.95  0.030 / 0.030
G03     315.3          45.6                8.1 +/-    0.61      10.8 +/-    0.61  0.040 / 0.030
G11     234.8          11.3                6.4 +/-   14.46      17.5 +/-   14.46  0.150 / 0.090
G14     63.8           38.5                6.1 +/-    0.89       9.1 +/-    0.89  0.090 / 0.130
G16     165.7          18.1               12.6 +/-    3.42      29.0 +/-    3.42  0.040 / 0.040
G22     301.4          67.6                9.1 +/-    0.35       9.8 +/-    0.35  0.040 / 0.040
G23     288.3          20.1                8.0 +/-    1.79      17.5 +/-    1.79  0.090 / 0.200
G26     137.4          39.3               11.9 +/-    1.05      17.5 +/-    1.05  0.090 / 0.200
G31     39.5           58.9                8.2 +/-    0.44       9.4 +/-    0.44  0.080 / 0.120
G32     79.1           22.5                6.6 +/-    1.32      13.7 +/-    1.32  0.070 / 0.120