Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 3 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/20/2020   09:40:05   (  -0.31,-128.19) (  -1.17,-124.37)  436.02                80
 03/21/2020   22:02:01   (   0.30,-128.19) (  -0.04,-129.67)  168.15                80
 03/22/2020   21:45:57   (   0.30,-128.17) (   0.97,-125.13)  345.65                80
 03/24/2020   10:07:44   (  -0.29,-128.10) (   0.24,-130.40)  262.23                80
 03/25/2020   09:46:19   (  -0.30,-128.07) (  -0.77,-125.87)  250.99                80
 03/26/2020   22:10:56   (   0.28,-128.06) (  -0.43,-131.17)  354.32                80
 03/27/2020   21:52:11   (   0.29,-128.03) (   0.58,-126.64)  158.93                80
 03/29/2020   10:13:59   (  -0.27,-127.96) (   0.63,-131.90)  449.38                80
 03/30/2020   09:52:34   (  -0.28,-127.92) (  -0.38,-127.37)   63.02                80
 04/01/2020   21:58:26   (   0.26,-127.86) (   0.19,-128.14)   31.87                80