PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-22:58:00
G01     276.1          41.3               10.9 +/-    1.84      15.5 +/-    1.84  0.050 / 0.060
G03     314.9          25.2                8.2 +/-    0.95      16.0 +/-    0.95  0.030 / 0.060
G10     127.4          20.8               10.1 +/-    2.01      21.7 +/-    2.01  0.050 / 0.070
G11     253.9          22.5                9.5 +/-    3.61      19.7 +/-    3.61  0.050 / 0.060
G14     39.6           51.8                9.5 +/-    1.65      11.7 +/-    1.65  0.100 / 0.150
G22     314.4          47.2                9.5 +/-    0.67      12.4 +/-    0.67  0.090 / 0.140
G25     55.2           17.4                8.5 +/-    3.31      20.0 +/-    3.31  0.020 / 0.020
G26     153.1          20.4               12.9 +/-    1.82      28.0 +/-    1.82  0.020 / 0.020
G31     76.1           80.3               10.3 +/-    0.89      10.4 +/-    0.89  0.040 / 0.060
G32     59.7           36.4                8.3 +/-    0.86      12.9 +/-    0.86  0.040 / 0.050