PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-20:13:10
G07     332.3          57.7               12.4 +/-    0.63      14.4 +/-    0.63  0.070 / 0.080
G08     105.3          52.6               12.7 +/-    1.00      15.6 +/-    1.00  0.070 / 0.070
G09     194.6          74.3               14.4 +/-    0.66      14.9 +/-    0.66  0.040 / 0.030
G11     147.8          12.4               19.1 +/-    1.34      50.5 +/-    1.34  0.040 / 0.030
G23     154.6          38.7               13.7 +/-    1.10      20.4 +/-    1.10  0.100 / 0.140
G27     54.4           31.1                9.5 +/-    1.85      16.3 +/-    1.85  0.140 / 0.200
G28     237.7          30.2               15.7 +/-    1.59      27.4 +/-    1.59  0.070 / 0.070
G30     303.8          37.6               11.5 +/-    1.18      17.3 +/-    1.18  0.060 / 0.100