Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 5 10.  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)
 05/11/2025   14:28:13   ( -70.22, 139.10) 05/11/2025   14:29:08  ( -70.23, 139.16)    2.88                55
 05/11/2025   15:18:57   (  70.10, -53.42) 05/11/2025   15:18:36  (  70.08, -53.42)    2.63                21
 05/11/2025   16:09:26   ( -69.32, 115.05) 05/11/2025   16:08:17  ( -69.35, 113.23)   71.74                69
 05/14/2025   05:54:45   (  71.14,  86.04) 05/14/2025   05:55:51  (  71.06,  88.66)   94.75                66
 05/14/2025   06:45:10   ( -70.15,-105.05) 05/14/2025   06:45:35  ( -70.18,-105.03)    2.71                25
 05/14/2025   07:35:54   (  70.03,  62.44) 05/14/2025   07:35:03  (  70.02,  62.39)    2.82                51
 05/16/2025   22:11:26   (  70.24,-156.74) 05/16/2025   22:12:32  (  70.21,-156.73)    3.51                66
 05/16/2025   23:02:07   ( -70.10,  10.80) 05/16/2025   23:02:02  ( -70.10,  10.74)    2.11                 5
 05/16/2025   23:52:45   (  69.66, 178.76) 05/16/2025   23:51:34  (  69.71, 177.85)   35.56                71
 05/19/2025   14:28:23   (  70.19, -40.90) 05/19/2025   14:28:57  (  70.21, -40.84)    3.10                34
 05/19/2025   15:19:03   ( -70.05, 126.63) 05/19/2025   15:18:27  ( -70.04, 126.55)    2.95                36
 05/22/2025   05:54:40   ( -70.53, -92.99) 05/22/2025   05:55:52  ( -70.40, -92.32)   28.54                72
 05/22/2025   06:45:19   (  70.14,  74.92) 05/22/2025   06:45:22  (  70.12,  74.93)    2.18                 3
 05/22/2025   07:36:00   ( -70.00,-117.54) 05/22/2025   07:34:52  ( -70.02,-117.59)    2.27                68