Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 3 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/19/2020   10:01:29   (  -0.31,-128.21) (  -0.15,-128.89)   77.56                80
 03/20/2020   09:40:05   (  -0.31,-128.19) (  -1.16,-124.36)  436.08                80
 03/21/2020   22:02:01   (   0.30,-128.19) (  -0.05,-129.66)  168.05                80
 03/22/2020   21:45:57   (   0.30,-128.17) (   0.97,-125.13)  345.82                80
 03/24/2020   10:07:44   (  -0.29,-128.10) (   0.25,-130.39)  261.96                80
 03/25/2020   09:46:19   (  -0.30,-128.08) (  -0.76,-125.86)  251.33                80
 03/26/2020   22:10:57   (   0.28,-128.07) (  -0.39,-131.18)  353.95                80
 03/27/2020   21:49:32   (   0.29,-128.04) (   0.63,-126.65)  159.37                80
 03/29/2020   10:13:59   (  -0.27,-127.97) (   0.59,-131.91)  448.84                80
 03/30/2020   09:52:35   (  -0.28,-127.93) (  -0.43,-127.38)   63.62                80