Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2023   06:27:53   (   0.06, -75.21) (   0.30, -76.41)  136.13                80
 09/20/2023   06:09:09   (   0.06, -75.21) (  -0.72, -71.88)  380.15                80
 09/21/2023   18:31:05   (  -0.05, -75.21) (  -0.48, -77.19)  224.47                80
 09/22/2023   18:15:01   (  -0.05, -75.21) (   0.54, -72.66)  291.81                80
 09/24/2023   06:34:08   (   0.04, -75.21) (   0.65, -77.92)  309.27                80
 09/25/2023   06:18:03   (   0.04, -75.21) (  -0.38, -73.40)  207.19                80
 09/26/2023   18:37:20   (  -0.03, -75.22) (  -0.81, -78.70)  396.77                80
 09/27/2023   18:21:15   (  -0.03, -75.23) (   0.22, -74.18)  120.40                80
 09/29/2023   06:43:03   (   0.02, -75.24) (   0.95, -79.44)  478.82                80
 09/30/2023   06:21:37   (   0.03, -75.25) (  -0.02, -74.91)   38.96                80
 10/02/2023   18:24:49   (  -0.03, -75.29) (  -0.11, -75.69)   45.58                80