Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 4 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2021   09:45:44   (   0.03,-127.50) (  -0.38,-125.66)  209.92                80
 04/30/2021   22:07:39   (  -0.04,-127.42) (  -0.83,-130.96)  402.66                80
 05/01/2021   21:51:34   (  -0.03,-127.38) (   0.17,-126.42)  109.27                80
 05/03/2021   10:13:20   (   0.04,-127.33) (   1.03,-131.68)  496.10                80
 05/04/2021   09:51:55   (   0.04,-127.28) (   0.03,-127.14)   15.15                80
 05/06/2021   21:55:04   (  -0.04,-127.14) (  -0.23,-127.90)   87.23                80
 05/07/2021   21:38:59   (  -0.04,-127.09) (   0.77,-123.36)  424.67                80
 05/09/2021   10:00:46   (   0.04,-127.04) (   0.37,-128.63)  180.40                80
 05/10/2021   09:39:21   (   0.04,-126.99) (  -0.63,-124.10)  330.42                80
 05/11/2021   22:01:15   (  -0.04,-126.88) (  -0.62,-129.38)  285.14                80
 05/12/2021   21:45:11   (  -0.03,-126.83) (   0.44,-124.86)  226.11                80