Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 3.  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)
 08/05/2023   07:34:03   ( -70.15,-117.61) 08/05/2023   07:35:14  ( -70.14,-117.34)   10.37                71
 08/05/2023   08:24:45   (  69.94,  50.03) 08/05/2023   08:24:43  (  69.93,  50.01)    0.95                 2
 08/05/2023   09:15:26   ( -69.79,-142.44) 08/05/2023   09:14:13  ( -69.81,-142.52)    3.62                73
 08/07/2023   23:50:52   ( -70.05,  -1.68) 08/07/2023   23:51:45  ( -70.04,  -1.60)    3.39                53
 08/08/2023   00:41:35   (  69.89, 165.87) 08/08/2023   00:41:13  (  69.88, 165.83)    2.28                22
 08/08/2023   01:32:03   ( -69.06, -25.61) 08/08/2023   01:30:55  ( -69.11, -27.58)   78.69                68
 08/10/2023   16:07:42   ( -69.96, 114.25) 08/10/2023   16:08:16  ( -69.96, 114.18)    2.62                34
 08/10/2023   16:58:26   (  69.86, -78.29) 08/10/2023   16:57:43  (  69.86, -78.32)    1.40                43
 08/13/2023   07:34:00   (  70.50,  61.87) 08/13/2023   07:35:10  (  70.35,  62.99)   44.87                70
 08/13/2023   08:24:34   ( -69.98,-130.00) 08/13/2023   08:24:45  ( -69.97,-129.93)    3.21                11
 08/13/2023   09:15:17   (  69.83,  37.54) 08/13/2023   09:14:13  (  69.80,  37.49)    3.11                64
 08/15/2023   23:50:42   (  70.01, 178.43) 08/15/2023   23:51:45  (  69.99, 178.36)    2.79                63
 08/16/2023   00:41:24   ( -69.91, -14.10) 08/16/2023   00:41:15  ( -69.89, -14.15)    2.52                 9
 08/16/2023   01:31:59   (  69.33, 154.05) 08/16/2023   01:30:49  (  69.39, 152.81)   49.01                70