Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 29.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2021   00:24:24   (  68.71, 172.06) 07/30/2021   00:25:06  (  68.69, 172.00)    2.58                42
 07/30/2021   01:15:05   ( -68.58, -20.45) 07/30/2021   01:14:36  ( -68.58, -20.51)    2.21                29
 08/01/2021   15:50:48   ( -69.43, 119.52) 08/01/2021   15:51:57  ( -69.28, 120.98)   59.64                69
 08/01/2021   16:41:20   (  68.66, -72.11) 08/01/2021   16:41:33  (  68.67, -72.15)    2.56                13
 08/01/2021   17:32:02   ( -68.58,  95.31) 08/01/2021   17:31:03  ( -68.56,  95.35)    2.20                59
 08/04/2021   08:07:32   ( -68.74,-123.76) 08/04/2021   08:08:33  ( -68.76,-123.80)    3.17                61
 08/04/2021   08:58:17   (  68.66,  43.65) 08/04/2021   08:58:00  (  68.65,  43.70)    2.67                17
 08/04/2021   09:48:48   ( -68.05,-148.24) 08/04/2021   09:47:37  ( -68.10,-149.33)   45.81                71
 08/07/2021   00:24:28   ( -68.75,  -8.00) 08/07/2021   00:24:59  ( -68.73,  -7.96)    2.16                31
 08/07/2021   01:15:12   (  68.62, 159.47) 08/07/2021   01:14:26  (  68.62, 159.54)    2.74                46
 08/09/2021   15:50:44   (  68.90, -59.76) 08/09/2021   15:51:55  (  68.86, -59.56)    9.04                71
 08/09/2021   16:41:24   ( -68.70, 107.82) 08/09/2021   16:41:26  ( -68.70, 107.88)    2.20                 2
 08/09/2021   17:32:07   (  68.52, -84.63) 08/09/2021   17:30:54  (  68.52, -84.70)    2.47                73