PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-21:27:30
G01     319.7          17.4                8.6 +/-    1.70      20.2 +/-    1.70  0.290 / 0.500
G08     261.4          15.0                8.0 +/-    2.88      20.0 +/-    2.88  0.240 / 0.450
G10     76.3           53.0                8.7 +/-    0.74      10.6 +/-    0.74  0.040 / 0.050
G11     307.6          19.5                8.0 +/-    0.67      17.9 +/-    0.67  0.040 / 0.050
G14     278.6          67.4                9.6 +/-    0.59      10.4 +/-    0.59  0.180 / 0.350
G20     103.7          29.4               10.2 +/-    1.03      18.1 +/-    1.03  0.140 / 0.310
G27     226.1          11.1               10.3 +/-    4.15      27.9 +/-    4.15  0.200 / 0.280
G31     175.7          39.2                9.7 +/-    1.43      14.3 +/-    1.43  0.290 / 0.160
G32     3.9            69.2                8.5 +/-    0.34       9.0 +/-    0.34  0.040 / 0.030