Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2021   06:24:48   (  -0.00, -75.18) (   0.00, -75.12)    6.83                80
 12/11/2021   18:27:58   (   0.00, -75.20) (  -0.12, -75.89)   78.62                80
 12/12/2021   18:11:51   (   0.00, -75.21) (   0.85, -71.35)  439.44                80
 12/14/2021   06:33:38   (  -0.00, -75.23) (   0.31, -76.62)  158.94                80
 12/15/2021   06:12:12   (   0.00, -75.24) (  -0.72, -72.09)  359.35                80
 12/16/2021   18:34:07   (  -0.00, -75.26) (  -0.48, -77.39)  242.05                80
 12/17/2021   18:18:01   (  -0.01, -75.28) (   0.55, -72.85)  276.52                80
 12/19/2021   06:39:46   (   0.01, -75.30) (   0.66, -78.11)  321.00                80
 12/20/2021   06:18:21   (   0.01, -75.32) (  -0.37, -73.58)  197.61                80
 12/21/2021   18:40:15   (  -0.01, -75.34) (  -0.83, -78.88)  403.35                80