Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 9 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/25/2021   09:56:11   (   0.37,-127.75) (   0.29,-127.34)   46.48                80
 09/27/2021   21:56:44   (  -0.35,-127.63) (  -0.45,-128.12)   55.49                80
 09/28/2021   21:40:39   (  -0.36,-127.59) (   0.56,-123.58)  456.66                80
 09/30/2021   09:59:47   (   0.34,-127.55) (   0.61,-128.85)  148.20                80
 10/01/2021   09:43:43   (   0.34,-127.51) (  -0.39,-124.32)  363.76                80
 10/02/2021   22:02:59   (  -0.32,-127.41) (  -0.82,-129.62)  251.59                80
 10/03/2021   21:46:55   (  -0.33,-127.37) (   0.19,-125.09)  260.08                80
 10/05/2021   10:06:03   (   0.30,-127.32) (   0.98,-130.36)  345.78                80
 10/06/2021   09:49:59   (   0.31,-127.28) (  -0.03,-125.82)  165.88                80
 10/07/2021   22:09:15   (  -0.29,-127.18) (  -1.17,-131.12)  449.83                80
 10/08/2021   21:53:10   (  -0.30,-127.12) (  -0.16,-126.59)   61.29                80