PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-16:28:00
G10     282.4          45.6               10.4 +/-    1.18      13.9 +/-    1.18  0.090 / 0.110
G15     48.8           36.2                6.4 +/-    0.36       9.9 +/-    0.36  0.100 / 0.120
G18     337.8          67.2                8.1 +/-    0.79       8.7 +/-    0.79  0.120 / 0.170
G20     62.8           27.5                6.1 +/-    0.80      11.3 +/-    0.80  0.140 / 0.190
G21     73.5           74.4               12.4 +/-    0.56      12.8 +/-    0.56  0.090 / 0.110
G24     109.6          21.6               10.4 +/-    1.07      22.1 +/-    1.07  0.060 / 0.130
G27     309.3          29.5                8.1 +/-    1.66      14.4 +/-    1.66  0.030 / 0.030
G29     166.8          13.9               13.0 +/-    0.75      33.2 +/-    0.75  0.030 / 0.040
G32     207.4          20.9               11.6 +/-    2.06      24.9 +/-    2.06  0.120 / 0.270