Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 6.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 04/08/2025   06:19:50   ( -70.25, -98.82) 04/08/2025   06:20:55  ( -70.22, -98.80)    3.28                65
 04/08/2025   07:10:33   (  70.11,  68.70) 04/08/2025   07:10:22  (  70.11,  68.70)    0.49                11
 04/08/2025   08:01:09   ( -69.68,-123.33) 04/08/2025   07:59:57  ( -69.72,-124.21)   34.24                72
 04/10/2025   22:36:39   ( -70.18,  17.07) 04/10/2025   22:37:21  ( -70.19,  17.04)    1.23                42
 04/10/2025   23:27:23   (  70.10,-175.50) 04/10/2025   23:26:48  (  70.08,-175.47)    2.73                35
 04/13/2025   14:02:59   (  70.88, -35.59) 04/13/2025   14:04:07  (  70.82, -33.76)   66.97                68
 04/13/2025   14:53:30   ( -70.18, 132.85) 04/13/2025   14:53:47  ( -70.16, 132.90)    2.53                17
 04/13/2025   15:44:13   (  70.05, -59.64) 04/13/2025   15:43:14  (  70.05, -59.61)    0.98                59
 04/16/2025   06:19:37   (  70.22,  81.27) 04/16/2025   06:20:43  (  70.20,  81.21)    2.71                66
 04/16/2025   07:10:20   ( -70.14,-111.30) 04/16/2025   07:10:12  ( -70.15,-111.23)    2.69                 8
 04/16/2025   08:00:56   (  69.65,  56.75) 04/16/2025   07:59:45  (  69.70,  55.79)   37.61                71
 04/18/2025   22:36:27   (  70.20,-162.91) 04/18/2025   22:37:07  (  70.20,-162.90)    0.38                40
 04/18/2025   23:27:09   ( -70.07,   4.60) 04/18/2025   23:26:37  ( -70.09,   4.58)    2.46                32