Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 6 15.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/15/2021   14:41:44   (  70.14, -43.96) 06/15/2021   14:40:40  (  70.13, -43.99)    1.67                64
 06/15/2021   15:31:14   ( -70.02, 123.51) 06/15/2021   15:31:22  ( -70.04, 123.47)    2.03                 8
 06/15/2021   16:20:48   (  69.54, -69.51) 06/15/2021   16:21:58  (  69.50, -68.42)   42.88                70
 06/18/2021   06:58:15   (  70.08,  71.83) 06/18/2021   06:57:37  (  70.10,  71.82)    2.55                38
 06/18/2021   07:47:45   ( -69.96,-120.69) 06/18/2021   07:48:18  ( -69.95,-120.64)    2.64                33
 06/20/2021   22:25:09   ( -70.61,  20.84) 06/20/2021   22:23:59  ( -70.71,  19.31)   57.41                70
 06/20/2021   23:14:44   (  70.07,-172.30) 06/20/2021   23:14:33  (  70.07,-172.38)    2.91                11
 06/21/2021   00:04:15   ( -69.90,  -4.90) 06/21/2021   00:05:14  ( -69.92,  -4.83)    3.59                59
 06/23/2021   14:41:48   ( -70.10, 135.99) 06/23/2021   14:40:45  ( -70.10, 136.03)    1.82                63
 06/23/2021   15:31:15   (  70.00, -56.52) 06/23/2021   15:31:29  (  70.00, -56.49)    1.01                14
 06/23/2021   16:20:53   ( -69.45, 110.36) 06/23/2021   16:22:03  ( -69.47, 111.60)   48.36                70
 06/26/2021   06:58:18   ( -70.09,-108.16) 06/26/2021   06:57:42  ( -70.08,-108.16)    0.90                36
 06/26/2021   07:47:45   (  69.98,  59.33) 06/26/2021   07:48:26  (  69.97,  59.31)    1.17                41
 06/28/2021   22:25:14   (  70.39,-159.47) 06/28/2021   22:24:02  (  70.43,-160.26)   29.65                72
 06/28/2021   23:14:48   ( -70.07,   7.70) 06/28/2021   23:14:39  ( -70.06,   7.63)    2.56                 9
 06/29/2021   00:04:16   (  69.90, 175.11) 06/29/2021   00:05:22  (  69.90, 175.18)    2.84                66