PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-19:57:40
G01     303.9          35.1                7.5 +/-    1.52      11.8 +/-    1.52  0.090 / 0.140
G10     109.4          38.1                9.5 +/-    0.59      14.3 +/-    0.59  0.100 / 0.110
G11     278.9          28.0                8.0 +/-    0.81      14.7 +/-    0.81  0.020 / 0.030
G14     4.2            65.2                6.6 +/-    0.65       7.1 +/-    0.65  0.030 / 0.030
G18     119.8          10.2               10.8 +/-    1.96      30.1 +/-    1.96  0.080 / 0.110
G22     310.7          28.2                6.6 +/-    2.01      12.0 +/-    2.01  0.090 / 0.120
G25     78.6           17.5               10.0 +/-    2.20      23.3 +/-    2.20  0.040 / 0.030
G31     166.4          67.8                9.1 +/-    0.25       9.7 +/-    0.25  0.050 / 0.040
G32     39.1           50.6                6.9 +/-    1.67       8.6 +/-    1.67  0.030 / 0.040