Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 8 7.  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)
 08/07/2023   08:15:52   (   0.02,-104.72) (  -0.28,-103.45)  145.65                80
 08/08/2023   20:37:46   (  -0.02,-104.70) (  -0.91,-108.74)  460.26                80
 08/09/2023   20:21:40   (  -0.02,-104.70) (   0.08,-104.20)   56.78                80
 08/12/2023   08:24:39   (   0.03,-104.72) (   0.09,-104.93)   23.88                80
 08/13/2023   08:03:14   (   0.03,-104.72) (  -0.96,-100.40)  492.88                80
 08/14/2023   20:25:07   (  -0.04,-104.70) (  -0.28,-105.69)  113.12                80
 08/15/2023   20:09:02   (  -0.04,-104.70) (   0.77,-101.16)  404.11                80
 08/17/2023   08:30:47   (   0.04,-104.73) (   0.43,-106.42)  192.61                80
 08/18/2023   08:09:21   (   0.04,-104.73) (  -0.57,-101.88)  324.47                80
 08/19/2023   20:31:15   (  -0.04,-104.71) (  -0.59,-107.18)  281.55                80
 08/20/2023   20:15:08   (  -0.04,-104.71) (   0.40,-102.64)  235.90                80