Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 9 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/24/2021   10:12:15   (   0.36,-127.79) (   1.28,-131.88)  466.32                80
 09/25/2021   09:56:11   (   0.37,-127.75) (   0.28,-127.34)   46.52                80
 09/27/2021   21:56:43   (  -0.35,-127.63) (  -0.49,-128.11)   55.64                80
 09/28/2021   21:40:38   (  -0.36,-127.58) (   0.52,-123.57)  456.59                80
 09/30/2021   09:59:47   (   0.34,-127.55) (   0.66,-128.84)  148.05                80
 10/01/2021   09:43:42   (   0.34,-127.51) (  -0.35,-124.31)  363.95                80
 10/02/2021   22:02:59   (  -0.32,-127.41) (  -0.80,-129.62)  251.58                80
 10/03/2021   21:46:55   (  -0.33,-127.37) (   0.21,-125.09)  260.11                80
 10/05/2021   10:06:03   (   0.30,-127.32) (   0.97,-130.36)  345.54                80
 10/06/2021   09:49:59   (   0.31,-127.28) (  -0.04,-125.83)  166.15                80
 10/07/2021   22:09:15   (  -0.29,-127.18) (  -1.16,-131.13)  449.74                80