PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-21:58:00
G01     257.9          38.0               11.7 +/-    2.64      17.7 +/-    2.64  0.050 / 0.040
G03     316.5          38.2                9.5 +/-    0.93      14.2 +/-    0.93  0.040 / 0.040
G11     242.4          15.8               12.3 +/-    1.71      30.1 +/-    1.71  0.020 / 0.030
G14     54.6           44.0               11.1 +/-    0.96      15.1 +/-    0.96  0.030 / 0.040
G22     310.4          60.2                9.2 +/-    1.27      10.4 +/-    1.27  0.200 / 0.130
G23     282.1          15.3               -1.2 +/-    2.25      -3.0 +/-    2.25  0.120 / 0.180
G25     43.8           12.9                9.7 +/-    1.89      25.4 +/-    1.89  0.050 / 0.070
G26     143.3          32.4               13.7 +/-    1.41      22.9 +/-    1.41  0.050 / 0.080
G31     42.9           66.6               11.2 +/-    0.41      12.1 +/-    0.41  0.060 / 0.070
G32     72.1           27.2               10.1 +/-    1.39      18.7 +/-    1.39  0.070 / 0.080