Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 27.  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   09:20:52   (   0.01,-117.21) (   0.46,-119.25)  232.13                80
 01/30/2023   09:04:43   (   0.01,-116.05) (  -0.32,-114.66)  159.03                80
 02/01/2023   21:05:02   (  -0.02,-113.14) (  -0.48,-115.29)  245.41                80
 02/02/2023   20:48:51   (  -0.02,-111.98) (   0.24,-110.69)  145.64                80
 02/05/2023   08:49:02   (   0.02,-109.05) (   0.50,-111.30)  256.28                80
 02/06/2023   08:32:51   (   0.02,-107.89) (  -0.22,-106.70)  134.77                80
 02/08/2023   20:33:10   (  -0.02,-104.97) (  -0.54,-107.34)  269.54                80
 02/09/2023   20:17:01   (  -0.02,-103.82) (   0.25,-102.76)  121.72                80