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               14.6 +/-    1.03      16.2 +/-    1.03  0.030 / 0.020
G06     53.9           72.9               12.2 +/-    0.26      12.7 +/-    0.26  0.040 / 0.020
G12     319.1          37.4               11.0 +/-    1.57      16.8 +/-    1.57  0.040 / 0.070
G17     56.2           35.0               11.9 +/-    1.38      18.8 +/-    1.38  0.060 / 0.050
G19     40.4           48.8               11.3 +/-    2.41      14.5 +/-    2.41  0.050 / 0.070
G24     263.3          41.2               14.0 +/-    2.27      19.9 +/-    2.27  0.070 / 0.070
G28     123.9          12.0               17.3 +/-    2.40      46.2 +/-    2.40  0.190 / 0.330