Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/28/2021   09:52:19   (   0.34,-127.65) (   0.25,-127.21)   50.26                80
 01/30/2021   21:58:09   (  -0.36,-127.62) (  -0.48,-127.97)   41.84                80
 01/31/2021   21:36:46   (  -0.34,-127.58) (   0.61,-123.46)  470.14                80
 02/02/2021   10:01:12   (   0.38,-127.47) (   0.66,-128.71)  141.82                80
 02/03/2021   09:39:48   (   0.36,-127.43) (  -0.36,-124.18)  369.67                80
 02/04/2021   22:04:23   (  -0.40,-127.41) (  -0.88,-129.47)  235.42                80
 02/05/2021   21:42:59   (  -0.38,-127.37) (   0.14,-124.94)  275.87                80
 02/07/2021   10:07:26   (   0.42,-127.25) (   1.07,-130.21)  337.15                80
 02/08/2021   09:46:01   (   0.40,-127.20) (   0.05,-125.68)  173.68                80
 02/09/2021   22:10:37   (  -0.44,-127.17) (  -1.28,-130.97)  432.66                80
 02/10/2021   21:49:12   (  -0.42,-127.13) (  -0.25,-126.44)   78.27                80