Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 12 25.  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)
 12/27/2023   07:34:47   ( -69.99,-117.66) 12/27/2023   07:35:52  ( -69.99,-117.60)    2.25                65
 12/27/2023   08:25:31   (  69.87,  49.82) 12/27/2023   08:25:19  (  69.89,  49.89)    3.38                12
 12/27/2023   09:16:06   ( -69.41,-142.19) 12/27/2023   09:14:54  ( -69.50,-143.00)   33.23                72
 12/29/2023   23:51:40   ( -69.95,  -1.83) 12/29/2023   23:52:20  ( -69.93,  -1.81)    2.95                40
 12/30/2023   00:42:24   (  69.84, 165.65) 12/30/2023   00:41:47  (  69.82, 165.68)    2.35                37
 01/01/2024   15:18:01   (  70.49, -54.22) 01/01/2024   15:19:11  (  70.37, -52.93)   50.06                70
 01/01/2024   16:08:33   ( -69.88, 114.06) 01/01/2024   16:08:48  ( -69.88, 114.00)    2.10                15
 01/01/2024   16:59:17   (  69.76, -78.46) 01/01/2024   16:58:15  (  69.76, -78.51)    1.66                62
 01/04/2024   07:34:45   (  69.96,  62.40) 01/04/2024   07:35:45  (  69.95,  62.36)    1.87                60
 01/04/2024   08:25:27   ( -69.86,-130.15) 01/04/2024   08:25:15  ( -69.84,-130.15)    2.71                12
 01/04/2024   09:16:00   (  69.17,  38.17) 01/04/2024   09:14:51  (  69.23,  36.67)   59.82                69
 01/06/2024   23:51:38   (  69.91, 178.25) 01/06/2024   23:52:11  (  69.92, 178.22)    2.17                33
 01/07/2024   00:42:20   ( -69.81, -14.29) 01/07/2024   00:41:41  ( -69.82, -14.29)    0.83                39