Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 10 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/03/2021   21:46:56   (  -0.33,-127.78) (   0.25,-125.10)  305.49                80
 10/05/2021   10:06:05   (   0.30,-127.85) (   0.85,-130.38)  287.78                80
 10/06/2021   09:50:01   (   0.32,-127.89) (  -0.15,-125.85)  232.66                80
 10/07/2021   22:09:18   (  -0.29,-127.92) (  -0.99,-131.16)  368.68                80
 10/08/2021   21:53:13   (  -0.31,-127.95) (   0.02,-126.63)  151.42                80
 10/10/2021   10:12:22   (   0.28,-128.01) (   1.15,-131.90)  443.17                80
 10/11/2021   09:56:17   (   0.29,-128.03) (   0.14,-127.37)   76.25                80
 10/13/2021   21:59:30   (  -0.27,-128.07) (  -0.26,-128.15)    8.14                80
 10/16/2021   09:59:54   (   0.25,-128.15) (   0.41,-128.89)   83.78                80