PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-23:27:50
G02     63.2           30.1                7.7 +/-    1.66      13.5 +/-    1.66  0.090 / 0.140
G05     52.2           56.2                9.0 +/-    0.56      10.6 +/-    0.56  0.090 / 0.130
G12     182.2          25.8               12.1 +/-    1.90      23.2 +/-    1.90  0.030 / 0.040
G13     124.2          18.5               11.8 +/-    1.06      27.0 +/-    1.06  0.030 / 0.040
G15     162.4          15.3               11.3 +/-    1.64      28.0 +/-    1.64  0.100 / 0.290
G21     274.9          19.5               11.9 +/-    1.62      26.5 +/-    1.62  0.120 / 0.200
G25     230.1          48.3               11.3 +/-    3.01      14.5 +/-    3.01  0.030 / 0.030
G29     330.5          58.2               11.2 +/-    1.00      13.0 +/-    1.00  0.030 / 0.030