Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2021   10:07:29   (   0.32,-127.85) (   0.86,-130.24)  272.91                80
 01/23/2021   09:46:05   (   0.30,-127.82) (  -0.15,-125.71)  239.85                80
 01/24/2021   22:10:41   (  -0.34,-127.82) (  -1.04,-131.02)  363.53                80
 01/25/2021   21:49:17   (  -0.32,-127.79) (  -0.01,-126.49)  148.84                80
 01/27/2021   10:13:43   (   0.36,-127.69) (   1.28,-131.74)  461.92                80
 01/28/2021   09:52:18   (   0.34,-127.65) (   0.26,-127.21)   50.05                80
 01/30/2021   21:58:09   (  -0.37,-127.61) (  -0.48,-127.97)   42.81                80
 01/31/2021   21:36:45   (  -0.34,-127.57) (   0.55,-123.45)  468.98                80
 02/02/2021   10:01:12   (   0.38,-127.46) (   0.66,-128.71)  142.82                80
 02/03/2021   09:39:48   (   0.36,-127.42) (  -0.36,-124.18)  368.56                80