Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 21.  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)
 06/21/2023   20:38:26   (  -0.00,-104.71) (  -0.93,-108.85)  471.95                80
 06/22/2023   20:22:21   (  -0.00,-104.71) (   0.11,-104.32)   44.72                80
 06/25/2023   08:25:23   (  -0.00,-104.72) (   0.06,-105.06)   37.84                80
 06/26/2023   08:03:58   (  -0.00,-104.72) (  -0.93,-100.52)  478.67                80
 06/27/2023   20:25:54   (   0.00,-104.71) (  -0.22,-105.83)  126.87                80
 06/28/2023   20:09:48   (  -0.00,-104.71) (   0.77,-101.29)  389.90                80
 06/30/2023   08:31:35   (   0.00,-104.73) (   0.44,-106.56)  208.95                80
 07/01/2023   08:10:10   (   0.00,-104.72) (  -0.61,-102.03)  307.21                80
 07/02/2023   20:32:06   (  -0.01,-104.70) (  -0.59,-107.33)  299.60                80
 07/03/2023   20:16:00   (  -0.00,-104.70) (   0.42,-102.80)  216.58                80
 07/05/2023   08:37:47   (   0.00,-104.71) (   0.73,-108.07)  382.46                80