PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-20:27:50
G01     272.8          41.1                9.9 +/-    2.40      14.2 +/-    2.40  0.080 / 0.060
G03     315.6          28.7                8.6 +/-    1.75      15.4 +/-    1.75  0.070 / 0.050
G10     128.9          18.6               11.4 +/-    0.95      26.0 +/-    0.95  0.030 / 0.030
G11     252.8          21.3               10.2 +/-    1.67      21.7 +/-    1.67  0.030 / 0.020
G14     41.6           51.0                8.6 +/-    0.68      10.8 +/-    0.68  0.190 / 0.200
G22     314.3          50.1                8.7 +/-    1.05      11.0 +/-    1.05  0.150 / 0.200
G25     53.6           17.2                7.6 +/-    2.84      17.9 +/-    2.84  0.050 / 0.060
G26     150.0          23.3               13.8 +/-    1.06      28.0 +/-    1.06  0.040 / 0.060
G31     60.5           76.6                8.7 +/-    0.55       9.0 +/-    0.55  0.060 / 0.070
G32     62.7           33.8                9.6 +/-    1.52      15.5 +/-    1.52  0.070 / 0.080