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) (  -0.47,-127.98)   41.19                80
 01/31/2021   21:36:45   (  -0.34,-127.58) (   0.56,-123.45)  470.86                80
 02/02/2021   10:01:12   (   0.38,-127.47) (   0.65,-128.71)  141.40                80
 02/03/2021   09:39:48   (   0.36,-127.43) (  -0.37,-124.18)  370.24                80
 02/04/2021   22:04:23   (  -0.40,-127.42) (  -0.87,-129.47)  234.05                80
 02/05/2021   21:42:59   (  -0.38,-127.38) (   0.16,-124.95)  277.39                80
 02/07/2021   10:07:26   (   0.42,-127.26) (   1.06,-130.21)  335.93                80
 02/08/2021   09:46:01   (   0.40,-127.21) (   0.09,-125.67)  175.07                80
 02/09/2021   22:10:37   (  -0.44,-127.19) (  -1.26,-130.97)  430.50                80
 02/10/2021   21:49:12   (  -0.42,-127.15) (  -0.24,-126.45)   80.64                80
 02/13/2021   09:54:54   (   0.44,-126.97) (   0.48,-127.17)   22.06                80