Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 24.  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)
 12/26/2024   13:39:01   ( -70.51, 151.16) 12/26/2024   13:40:13  ( -70.41, 151.86)   28.35                72
 12/26/2024   14:29:39   (  70.10, -40.90) 12/26/2024   14:29:44  (  70.09, -40.97)    3.23                 5
 12/26/2024   15:20:21   ( -70.00, 126.58) 12/26/2024   15:19:13  ( -70.03, 126.59)    3.66                68
 12/29/2024   05:55:46   ( -70.21, -92.58) 12/29/2024   05:56:45  ( -70.19, -92.58)    1.91                59
 12/29/2024   06:46:29   (  70.06,  74.95) 12/29/2024   06:46:12  (  70.08,  74.91)    2.71                17
 12/29/2024   07:37:01   ( -69.43,-116.79) 12/29/2024   07:35:51  ( -69.48,-118.29)   58.58                70
 12/31/2024   22:12:35   ( -70.18,  23.25) 12/31/2024   22:13:11  ( -70.19,  23.31)    2.93                36
 12/31/2024   23:03:18   (  70.04,-169.22) 12/31/2024   23:02:39  (  70.03,-169.28)    2.31                39
 01/03/2025   13:38:52   (  70.75, -29.18) 01/03/2025   13:40:01  (  70.63, -27.78)   53.07                69
 01/03/2025   14:29:24   ( -70.11, 139.14) 01/03/2025   14:29:38  ( -70.15, 139.14)    3.56                14
 01/03/2025   15:20:08   (  70.02, -53.41) 01/03/2025   15:19:05  (  70.03, -53.38)    1.63                63
 01/06/2025   05:55:32   (  70.22,  87.45) 01/06/2025   05:56:34  (  70.20,  87.48)    2.18                62
 01/06/2025   06:46:14   ( -70.11,-105.07) 01/06/2025   06:46:04  ( -70.10,-105.03)    2.16                10
 01/06/2025   07:36:49   (  69.54,  63.08) 01/06/2025   07:35:38  (  69.60,  61.91)   45.77                71