Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/30/2021   21:58:10   (  -0.36,-127.62) (  -0.42,-127.99)   41.35                80
 01/31/2021   21:36:46   (  -0.34,-127.58) (   0.60,-123.46)  470.66                80
 02/02/2021   10:01:12   (   0.38,-127.47) (   0.67,-128.71)  141.47                80
 02/03/2021   09:39:48   (   0.36,-127.43) (  -0.35,-124.18)  370.13                80
 02/04/2021   22:04:24   (  -0.40,-127.42) (  -0.83,-129.48)  234.47                80
 02/05/2021   21:42:58   (  -0.38,-127.38) (   0.14,-124.94)  276.95                80
 02/07/2021   10:07:26   (   0.42,-127.25) (   1.07,-130.21)  336.24                80
 02/08/2021   09:46:01   (   0.40,-127.21) (   0.05,-125.68)  174.68                80
 02/09/2021   22:10:37   (  -0.44,-127.19) (  -1.28,-130.97)  431.15                80
 02/10/2021   21:49:12   (  -0.42,-127.14) (  -0.25,-126.44)   79.88                80