PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-22:42:50
G02     217.6          62.7               15.0 +/-    1.27      16.6 +/-    1.27  0.040 / 0.040
G06     53.0           72.0               12.3 +/-    0.48      12.8 +/-    0.48  0.050 / 0.040
G12     319.3          38.4                9.3 +/-    0.71      13.9 +/-    0.71  0.040 / 0.070
G17     57.2           33.7               11.7 +/-    2.88      19.1 +/-    2.88  0.060 / 0.070
G19     39.9           49.1               10.6 +/-    1.68      13.5 +/-    1.68  0.030 / 0.030
G24     262.5          41.2               14.9 +/-    3.38      21.3 +/-    3.38  0.030 / 0.030
G28     124.0          12.0               15.9 +/-    1.54      42.4 +/-    1.54  0.190 / 0.410