Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 01/29/2023   09:20:51   (   0.03,-117.18) (   0.50,-119.24)  234.58                80
 01/30/2023   09:04:42   (   0.03,-116.03) (  -0.27,-114.65)  156.85                80
 02/01/2023   21:05:01   (  -0.04,-113.11) (  -0.53,-115.28)  247.17                80
 02/02/2023   20:48:51   (  -0.04,-111.96) (   0.25,-110.70)  144.15                80
 02/05/2023   08:49:01   (   0.05,-109.04) (   0.55,-111.29)  256.63                80
 02/06/2023   08:32:52   (   0.05,-107.88) (  -0.23,-106.71)  134.68                80
 02/08/2023   20:33:10   (  -0.06,-104.97) (  -0.60,-107.33)  269.37                80
 02/09/2023   20:17:00   (  -0.05,-103.81) (   0.19,-102.74)  122.14                80