Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 1 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-19) NOAA-19 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/21/2017   16:38:29   (  80.90,-121.67) 01/21/2017   16:39:44  (  80.92,-121.48)    4.32                75
 01/21/2017   17:29:33   ( -80.91,  46.09) 01/21/2017   17:30:28  ( -80.91,  46.04)    0.88                55
 01/21/2017   18:20:29   (  80.91,-146.52) 01/21/2017   18:21:13  (  80.91,-146.54)    0.56                44
 01/21/2017   19:11:35   ( -80.91,  20.50) 01/21/2017   19:11:58  ( -80.92,  20.62)    2.37                23
 01/21/2017   20:02:31   (  80.91,-172.11) 01/21/2017   20:02:43  (  80.91,-171.96)    2.62                12
 01/21/2017   20:53:36   ( -80.91,  -4.73) 01/21/2017   20:53:28  ( -80.92,  -4.80)    1.36                 8
 01/21/2017   21:44:32   (  80.92, 162.67) 01/21/2017   21:44:13  (  80.91, 162.62)    1.01                19
 01/21/2017   22:35:38   ( -80.91, -30.32) 01/21/2017   22:34:58  ( -80.92, -30.22)    1.98                40
 01/21/2017   23:26:34   (  80.91, 137.08) 01/21/2017   23:25:43  (  80.92, 137.19)    2.01                51