PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-00:28:10
G02     217.2          63.2               15.5 +/-    1.06      17.1 +/-    1.06  0.050 / 0.080
G06     53.9           72.9               13.5 +/-    0.68      14.0 +/-    0.68  0.040 / 0.080
G12     319.1          37.4               11.7 +/-    1.22      17.8 +/-    1.22  0.130 / 0.460
G17     56.2           35.0               11.4 +/-    0.83      18.0 +/-    0.83  0.110 / 0.460
G19     40.4           48.8               12.6 +/-    1.15      16.1 +/-    1.15  0.080 / 0.100
G24     263.3          41.2               13.9 +/-    1.30      19.8 +/-    1.30  0.070 / 0.100
G28     123.9          12.0               17.1 +/-    1.80      45.7 +/-    1.80  0.040 / 0.060