Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 12 7.  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)    6.49                80
 12/11/2021   18:27:57   (   0.00, -75.20) (  -0.17, -75.88)   78.73                80
 12/12/2021   18:11:52   (   0.00, -75.21) (   0.86, -71.35)  439.29                80
 12/14/2021   06:33:38   (  -0.00, -75.22) (   0.30, -76.62)  159.16                80
 12/15/2021   06:12:12   (   0.00, -75.24) (  -0.73, -72.09)  359.11                80
 12/16/2021   18:34:07   (  -0.00, -75.26) (  -0.48, -77.39)  242.29                80
 12/17/2021   18:18:01   (  -0.01, -75.28) (   0.56, -72.86)  276.25                80
 12/19/2021   06:39:46   (   0.01, -75.30) (   0.66, -78.11)  321.35                80
 12/20/2021   06:18:21   (   0.01, -75.31) (  -0.37, -73.58)  197.22                80