PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-00:58:00
G02     38.8           50.5                9.5 +/-    0.40      11.9 +/-    0.40  0.040 / 0.040
G05     123.5          66.5               11.4 +/-    0.83      12.4 +/-    0.83  0.040 / 0.040
G06     57.3           11.0                8.7 +/-    2.00      23.9 +/-    2.00  0.030 / 0.040
G12     192.5          61.0               12.5 +/-    0.98      14.1 +/-    0.98  0.030 / 0.040
G25     288.4          56.0                9.7 +/-    1.28      11.4 +/-    1.28  0.040 / 0.060
G29     310.8          31.4                9.0 +/-    1.38      15.3 +/-    1.38  0.030 / 0.060