Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 12 22.  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)
 12/28/2017   09:08:02   ( -80.69, 175.23) 12/28/2017   09:09:03  ( -80.70, 175.23)    0.83                61
 12/28/2017   09:59:02   (  80.69, -17.56) 12/28/2017   09:59:48  (  80.70, -17.49)    1.77                46
 12/28/2017   10:50:03   ( -80.70, 149.86) 12/28/2017   10:50:33  ( -80.71, 149.81)    1.08                30
 12/28/2017   11:41:03   (  80.70, -42.94) 12/28/2017   11:41:18  (  80.71, -42.91)    1.20                15
 12/28/2017   12:32:04   ( -80.70, 124.48) 12/28/2017   12:32:03  ( -80.71, 124.39)    1.75                 1
 12/28/2017   13:23:04   (  80.70, -68.32) 12/28/2017   13:22:48  (  80.71, -68.34)    0.93                16
 12/28/2017   14:14:05   ( -80.71,  99.11) 12/28/2017   14:13:33  ( -80.71,  98.97)    2.53                32
 12/28/2017   15:05:05   (  80.71, -93.70) 12/28/2017   15:04:18  (  80.71, -93.76)    1.19                47
 12/28/2017   15:56:06   ( -80.71,  73.73) 12/28/2017   15:55:03  ( -80.71,  73.55)    3.35                63