Simultaneous Nadir Overpasses (SNOs) between METOP-B and NPP
TLE Epoch: 2018 5 21.  Predictions up to the next  14.0 days:

     Date     Time(METOP-B) METOP-B Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/21/2018   20:54:44   ( -72.75,  37.87) 05/21/2018   20:55:52  ( -72.72,  37.86)    3.35                68
 05/21/2018   21:45:25   (  72.66,-154.97) 05/21/2018   21:46:38  (  72.72,-154.83)    7.90                73
 05/21/2018   22:36:08   ( -72.62,  12.28) 05/21/2018   22:37:21  ( -72.67,  12.58)   11.30                73
 05/21/2018   23:26:52   (  72.38, 179.13) 05/21/2018   23:28:02  (  72.42,-179.60)   43.09                70
 05/22/2018   00:17:35   ( -72.35, -13.62) 05/22/2018   00:18:45  ( -72.37, -12.19)   48.04                70
 05/22/2018   01:08:18   (  72.10, 153.25) 05/22/2018   01:09:25  (  72.12, 155.62)   81.16                67
 05/22/2018   01:59:02   ( -72.02, -39.59) 05/22/2018   02:00:08  ( -72.07, -36.98)   89.69                66