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)
 10/02/2021   22:03:01   (  -0.32,-127.74) (  -0.72,-129.64)  215.38                80
 10/03/2021   21:46:56   (  -0.33,-127.78) (   0.29,-125.10)  305.23                80
 10/05/2021   10:06:05   (   0.30,-127.85) (   0.88,-130.38)  288.01                80
 10/06/2021   09:50:00   (   0.32,-127.88) (  -0.13,-125.84)  232.35                80
 10/07/2021   22:09:17   (  -0.29,-127.91) (  -1.02,-131.15)  369.22                80
 10/08/2021   21:53:13   (  -0.31,-127.94) (  -0.01,-126.62)  150.77                80
 10/10/2021   10:12:21   (   0.28,-128.00) (   1.17,-131.89)  443.76                80
 10/11/2021   09:56:17   (   0.29,-128.03) (   0.16,-127.36)   75.61                80
 10/13/2021   21:56:50   (  -0.27,-128.07) (  -0.28,-128.14)    8.53                80