Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 27.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 02/27/2023   14:53:21   (  70.13, -47.12) 02/27/2023   14:54:19  (  70.15, -47.10)    2.25                58
 02/27/2023   15:44:03   ( -70.05, 120.34) 02/27/2023   15:43:49  ( -70.04, 120.36)    1.39                14
 02/27/2023   16:34:35   (  69.29, -71.25) 02/27/2023   16:33:26  (  69.39, -72.88)   64.94                69
 03/02/2023   07:10:15   (  70.08,  68.73) 03/02/2023   07:10:49  (  70.10,  68.69)    1.95                34
 03/02/2023   08:00:57   ( -69.99,-123.82) 03/02/2023   08:00:19  ( -69.98,-123.84)    1.59                38
 03/04/2023   22:36:33   ( -70.63,  16.33) 03/04/2023   22:37:43  ( -70.55,  17.57)   46.79                70
 03/04/2023   23:27:08   (  70.04,-175.45) 03/04/2023   23:27:17  (  70.06,-175.49)    2.27                 9
 03/05/2023   00:17:50   ( -69.95,  -7.99) 03/05/2023   00:16:47  ( -69.95,  -8.01)    0.90                63
 03/07/2023   14:53:19   ( -70.18, 132.81) 03/07/2023   14:54:18  ( -70.16, 132.88)    3.48                59
 03/07/2023   15:44:02   (  70.02, -59.64) 03/07/2023   15:43:46  (  69.99, -59.70)    3.48                16
 03/07/2023   16:34:34   ( -69.39, 108.60) 03/07/2023   16:33:24  ( -69.44, 107.18)   55.88                70
 03/10/2023   07:10:12   ( -70.10,-111.31) 03/10/2023   07:10:46  ( -70.12,-111.29)    1.64                34
 03/10/2023   08:00:56   (  70.00,  56.16) 03/10/2023   08:00:13  (  70.00,  56.20)    1.64                43
 03/12/2023   22:36:29   (  70.46,-163.41) 03/12/2023   22:37:40  (  70.37,-162.68)   29.22                71
 03/12/2023   23:27:05   ( -70.04,   4.56) 03/12/2023   23:27:14  ( -70.04,   4.49)    2.63                 9
 03/13/2023   00:17:49   (  69.94, 172.02) 03/13/2023   00:16:41  (  69.93, 171.97)    1.92                68