Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 8 17.  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)
 08/18/2025   05:55:22   (  70.80,  86.40) 08/18/2025   05:56:30  (  70.69,  88.19)   66.72                68
 08/18/2025   06:45:52   ( -70.05,-105.09) 08/18/2025   06:46:10  ( -70.03,-105.14)    3.08                18
 08/18/2025   07:36:35   (  69.91,  62.43) 08/18/2025   07:35:37  (  69.93,  62.36)    3.43                58
 08/20/2025   22:12:04   (  70.13,-156.75) 08/20/2025   22:13:10  (  70.14,-156.74)    1.40                66
 08/20/2025   23:02:46   ( -70.00,  10.76) 08/20/2025   23:02:40  ( -70.03,  10.73)    2.69                 6
 08/20/2025   23:53:24   (  69.60, 178.66) 08/20/2025   23:52:12  (  69.65, 177.85)   31.99                72
 08/23/2025   14:28:58   (  70.08, -40.91) 08/23/2025   14:29:40  (  70.11, -40.90)    3.45                42
 08/23/2025   15:19:41   ( -70.01, 126.51) 08/23/2025   15:19:10  ( -70.01, 126.58)    2.76                31
 08/26/2025   05:55:23   ( -70.96, -93.86) 08/26/2025   05:56:30  ( -70.84, -91.59)   83.85                67
 08/26/2025   06:45:51   (  70.04,  74.92) 08/26/2025   06:46:09  (  70.07,  74.93)    3.21                18
 08/26/2025   07:36:34   ( -69.97,-117.65) 08/26/2025   07:35:39  ( -69.97,-117.59)    2.65                55
 08/28/2025   22:12:02   ( -70.14,  23.23) 08/28/2025   22:13:12  ( -70.13,  23.25)    1.72                70
 08/28/2025   23:02:45   (  70.01,-169.25) 08/28/2025   23:02:39  (  70.02,-169.27)    0.91                 6
 08/28/2025   23:53:24   ( -69.73,  -1.51) 08/28/2025   23:52:11  ( -69.80,  -1.93)   18.16                73