Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 29.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 01/30/2023   15:18:51   (  70.08, -53.33) 01/30/2023   15:19:27  (  70.10, -53.35)    2.83                36
 01/30/2023   16:09:33   ( -69.99, 114.12) 01/30/2023   16:08:57  ( -69.99, 114.12)    0.27                36
 02/02/2023   06:45:12   ( -70.88,-106.14) 02/02/2023   06:46:20  ( -70.74,-104.19)   72.89                68
 02/02/2023   07:35:43   (  70.09,  62.43) 02/02/2023   07:35:57  (  70.09,  62.50)    2.55                14
 02/02/2023   08:26:24   ( -69.95,-130.03) 02/02/2023   08:25:28  ( -69.92,-130.10)    3.40                56
 02/04/2023   23:01:51   ( -70.16,  10.78) 02/04/2023   23:03:01  ( -70.16,  10.82)    1.59                70
 02/04/2023   23:52:35   (  70.05, 178.26) 02/04/2023   23:52:28  (  70.05, 178.32)    2.24                 7
 02/05/2023   00:43:13   ( -69.75, -13.97) 02/05/2023   00:42:00  ( -69.83, -14.35)   17.57                73
 02/07/2023   15:18:42   ( -70.08, 126.68) 02/07/2023   15:19:32  ( -70.10, 126.62)    3.38                50
 02/07/2023   16:09:26   (  69.97, -65.85) 02/07/2023   16:08:59  (  69.99, -65.89)    2.63                27
 02/07/2023   16:59:51   ( -68.98, 102.90) 02/07/2023   16:58:45  ( -69.00, 100.42)   99.20                66
 02/10/2023   07:35:34   ( -70.06,-117.51) 02/10/2023   07:36:02  ( -70.07,-117.55)    1.96                28
 02/10/2023   08:26:18   (  69.96,  49.96) 02/10/2023   08:25:29  (  69.96,  49.94)    0.74                49