Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 21.  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)
 12/21/2022   14:28:36   (  71.03, -42.08) 12/21/2022   14:29:42  (  70.94, -39.69)   87.36                66
 12/21/2022   15:19:02   ( -70.10, 126.72) 12/21/2022   15:19:25  ( -70.12, 126.72)    1.58                23
 12/21/2022   16:09:46   (  69.98, -65.79) 12/21/2022   16:08:52  (  70.02, -65.78)    3.62                54
 12/24/2022   06:45:15   (  70.16,  75.08) 12/24/2022   06:46:24  (  70.15,  75.01)    3.19                69
 12/24/2022   07:35:57   ( -70.07,-117.47) 12/24/2022   07:35:53  ( -70.09,-117.44)    2.11                 4
 12/24/2022   08:26:36   (  69.69,  50.41) 12/24/2022   08:25:24  (  69.76,  49.75)   26.76                72
 12/26/2022   23:02:09   (  70.14,-169.13) 12/26/2022   23:02:50  (  70.14,-169.11)    1.05                41
 12/26/2022   23:52:51   ( -70.05,  -1.67) 12/26/2022   23:52:20  ( -70.04,  -1.63)    2.24                31
 12/29/2022   14:28:32   ( -70.87, 138.17) 12/29/2022   14:29:40  ( -70.78, 140.08)   70.50                68
 12/29/2022   15:19:03   (  70.07, -53.27) 12/29/2022   15:19:18  (  70.07, -53.33)    2.36                15
 12/29/2022   16:09:45   ( -69.98, 114.19) 12/29/2022   16:08:48  ( -69.96, 114.16)    2.29                57
 01/01/2023   06:45:14   ( -70.18,-104.97) 01/01/2023   06:46:17  ( -70.20,-104.90)    3.39                63
 01/01/2023   07:35:58   (  70.07,  62.51) 01/01/2023   07:35:44  (  70.08,  62.58)    3.09                14
 01/01/2023   08:26:32   ( -69.55,-129.41) 01/01/2023   08:25:21  ( -69.59,-130.46)   41.24                71
 01/03/2023   23:02:08   ( -70.12,  10.88) 01/03/2023   23:02:44  ( -70.13,  10.90)    1.50                36
 01/03/2023   23:52:52   (  70.02, 178.35) 01/03/2023   23:52:11  (  70.01, 178.38)    1.31                41