PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-19:28:00
G01     319.7          15.7                9.4 +/-    1.56      23.0 +/-    1.56  0.280 / 0.390
G08     259.9          14.4               10.2 +/-    1.00      25.9 +/-    1.00  0.240 / 0.350
G10     74.9           55.2                9.2 +/-    0.46      10.9 +/-    0.46  0.160 / 0.360
G11     305.9          21.4                8.9 +/-    2.50      18.9 +/-    2.50  0.130 / 0.280
G14     289.4          70.0               10.6 +/-    0.80      11.2 +/-    0.80  0.030 / 0.030
G18     100.3          29.3               10.1 +/-    0.95      17.9 +/-    0.95  0.030 / 0.040
G27     224.7          10.0                8.9 +/-   20.73      24.8 +/-   20.73  0.040 / 0.050
G31     178.2          37.7               13.0 +/-    2.03      19.6 +/-    2.03  0.040 / 0.050
G32     359.4          69.7               11.1 +/-    0.66      11.8 +/-    0.66  0.090 / 0.250