Re: TLE with future epoch

From: Dr. T.S. Kelso via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 1 May 2017 01:40:48 +0000
Yes, an age of -1.32 days means that at the time the data was assessed, that TLE had an epoch 1.32 days in the future. Currently, the data is pulled and assessed every 2 hours at 5 minutes past the hour, but eventually I will make that page dynamic, so that it provides the age from the time the page is requested.  - TS

Dr. T.S. Kelso
CelesTrak, https://celestrak.com
E-Mail: ts.kelso_at_celestrak.com<mailto:ts.kelso_at_celestrak.com>

On 2017 Apr 30, at 04:03, wkitty42--- via Seesat-l <seesat-l_at_satobs.org<mailto:seesat-l_at_satobs.org>> wrote:

On 04/28/2017 12:37 PM, Dr. T.S. Kelso via Seesat-l wrote:
Hi Simone,

As Cees points out, JSpOC does this regularly. We do track this on CelesTrak at http://celestrak.com/NORAD/elements/predicted-tles.txt, if you ever want to see which TLEs are involved. We have seen some with epochs almost 30 days in the future. We track this because it can cause problems for certain groups of our users.  - TS


can you please give a quick explanation of what the "Age" tag on LINE 0 of the TLEs at the above URL denotes? for example, the first LINE 0 has "Age = -1.32"... does that mean that it is 1.32 days in the future?



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Received on Sun Apr 30 2017 - 20:41:37 UTC

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