PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-17:42:50
G07     324.6          54.6               11.4 +/-    1.03      13.7 +/-    1.03  0.040 / 0.060
G08     113.8          50.2               14.3 +/-    0.64      17.9 +/-    0.64  0.040 / 0.060
G09     207.3          79.3               11.3 +/-    0.54      11.5 +/-    0.54  0.050 / 0.080
G16     45.4           10.3                9.0 +/-    1.93      25.1 +/-    1.93  0.040 / 0.080
G23     151.9          42.6               12.8 +/-    1.27      17.8 +/-    1.27  0.120 / 0.480
G27     60.1           33.9               10.9 +/-    0.74      17.7 +/-    0.74  0.170 / 0.660
G28     233.4          25.6               13.5 +/-    1.85      26.1 +/-    1.85  0.080 / 0.200
G30     298.6          32.9               10.2 +/-    2.25      16.9 +/-    2.25  0.060 / 0.200