Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 8 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/19/2021   06:24:02   (  -0.13, -75.21) (  -0.14, -75.09)   13.52                80
 08/21/2021   18:27:16   (   0.14, -75.20) (   0.00, -75.87)   76.11                80
 08/22/2021   18:11:11   (   0.14, -75.20) (   0.99, -71.34)  440.62                80
 08/24/2021   06:33:00   (  -0.14, -75.22) (   0.19, -76.61)  158.52                80
 08/25/2021   06:12:40   (  -0.14, -75.23) (  -0.86, -72.08)  358.67                16
 08/26/2021   18:33:33   (   0.15, -75.24) (  -0.33, -77.39)  245.30                80
 08/27/2021   18:17:29   (   0.15, -75.25) (   0.67, -72.86)  272.34                80
 08/29/2021   06:39:18   (  -0.15, -75.28) (   0.46, -78.14)  325.47                80
 08/30/2021   06:17:54   (  -0.15, -75.29) (  -0.53, -73.60)  192.17                80
 08/31/2021   18:39:51   (   0.16, -75.30) (  -0.65, -78.91)  411.44                80