GOES GRB First Light!
When the GOES-16 was first announced I got interested in their GRB Downlink (although the first try was at HRIT downlink). Basically GRB is a replacement for the old PDR downlink in GOES 13/14/15 generation, which gives few advantages over the old link: Uses market standard DVB-S2 Generic Stream Have FEC (as defined by DVB-S2) Higher bandwidth Easier to receive due DVB-S2 FEC For those who don’t know, the GRB is a direct rebroadcast of GOES data, with minimum processing as possible (usually just packaged into NetCDF files with calibration parameters) and is intended for anyone that want’s to get...
Linux shim for Patching executable in run-time
Linux shim for Patching executable in run-time That’s something I already did a long time and few people know. It’s not something hard or complex to do, but few people know how easy is to make a Library Shim. First, what’s a shim? A shim is a small library that can intercept API calls transparently for a specific program / library. Basically its a proxy library that can transparently intercept some API calls to either change the content, monitor the data or just making a API translation. That has its variants over all Operating Systems (Linux, Mac OSX, Windows) but...
Some LNA tests for HRIT/LRIT
So I was talking with @luigi on OSP RocketChat and he noticed that one of the LNA’s I suggested alogn with the LNA4ALL (the SPF5189) got a comment on ebay saying that it doesn’t work on L Band. So that was weird to me, since I have 5 of them, and one currently in use with my GOES setup. So I decided to do a small and crude benchmark for L Band comparing no LNA with LNA4ALL and SPF5189. So the test I wanted to do was pretty simple: check how the LNAs was effective over LRIT/HRIT band (L Band...
GOES 16 Test Week Results
In the week from March 27th to 31 NOAA performed some new downstream tests over HRIT link on GOES-16. The idea was to transfer some CMI (Cloud and Moisture Imaging) products and see if the software developers and current stations could receive it fine. Before starting talking about that, please notice that all data sent so far is stated as test data and should not be used for any real world measurements. As NOAA states (and I forwarded on my last post): The user of that link assumes all risks related to the use of their data and NOAA disclaims and any...
GOES 16 Test Week
Yesterday I received an email from NOAA (I’m on their “tester” list) about some tests on GOES-16 that will happen this week. Before I start talking about what will be the tests I want to be clear that GOES-16 is NOT operational yet and any data received from the LRIT/HRIT downlink are test only data. This means the user of that link assumes all risks related to the use of their data and NOAA disclaims and any and all warranties, whether express or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. So this week (...