Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 12.  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)
 01/14/2023   14:28:35   ( -71.13, 137.69) 01/14/2023   14:29:41  ( -71.04, 140.45)   99.98                66
 01/14/2023   15:19:01   (  70.07, -53.30) 01/14/2023   15:19:24  (  70.06, -53.37)    2.58                23
 01/14/2023   16:09:43   ( -69.98, 114.15) 01/14/2023   16:08:54  ( -69.95, 114.11)    3.16                49
 01/17/2023   06:45:11   ( -70.23,-105.09) 01/17/2023   06:46:22  ( -70.21,-104.91)    6.60                71
 01/17/2023   07:35:54   (  70.06,  62.48) 01/17/2023   07:35:50  (  70.05,  62.50)    1.42                 4
 01/17/2023   08:26:34   ( -69.86,-129.91) 01/17/2023   08:25:21  ( -69.89,-130.10)    7.67                73
 01/19/2023   23:02:03   ( -70.12,  10.85) 01/19/2023   23:02:50  ( -70.12,  10.84)    0.54                47
 01/19/2023   23:52:47   (  70.01, 178.32) 01/19/2023   23:52:17  (  70.00, 178.32)    0.87                30
 01/22/2023   14:28:28   (  70.91, -41.96) 01/22/2023   14:29:35  (  70.80, -39.89)   76.42                67
 01/22/2023   15:18:56   ( -70.08, 126.68) 01/22/2023   15:19:16  ( -70.09, 126.70)    2.26                20
 01/22/2023   16:09:40   (  69.97, -65.85) 01/22/2023   16:08:43  (  69.98, -65.82)    1.41                57
 01/25/2023   06:45:07   (  70.14,  75.03) 01/25/2023   06:46:12  (  70.14,  75.03)    0.31                65
 01/25/2023   07:35:49   ( -70.04,-117.50) 01/25/2023   07:35:42  ( -70.04,-117.48)    0.67                 7
 01/25/2023   08:26:26   (  69.57,  50.52) 01/25/2023   08:25:15  (  69.59,  49.54)   37.95                71