PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-16:57:30
G07     335.3          58.8               11.0 +/-    0.51      12.7 +/-    0.51  0.030 / 0.040
G08     99.9           53.1               11.6 +/-    0.44      14.1 +/-    0.44  0.040 / 0.040
G09     189.4          71.6               12.0 +/-    0.57      12.6 +/-    0.57  0.050 / 0.090
G11     145.3          14.2               13.5 +/-    1.61      34.2 +/-    1.61  0.090 / 0.090
G23     154.6          34.6               13.2 +/-    1.35      21.1 +/-    1.35  0.030 / 0.040
G27     52.8           30.3               11.2 +/-    2.00      19.5 +/-    2.00  0.030 / 0.050
G28     239.2          31.5               13.8 +/-    2.21      23.4 +/-    2.21  0.090 / 0.140
G30     304.4          37.4               11.0 +/-    1.18      16.7 +/-    1.18  0.070 / 0.140