Archive for 2013

AGU2013 IGS Infrastructure Committee poster

Wednesday, December 11th, 2013

From 9 to 13 December I participated in the AGU Fall Meeting 2013 presenting a poster of some interesting IGS work. As the IGS Infrastructure Committee Chairman I have coordinated an experiment together with the IGS Network Coordinator, the Reference Working Group, the Antenna Working Group, and the Analysis Center Coordinator. The experiment consisted on identifying the worse performing monument ties for co-located geodetic stations from ITRF08 involving a GNSS antenna covered with an uncalibrated radome.

Uncalibrated radomes introduce an unknown offset into the estimated station positions so via post-processing we have tried to estimate the radome effect in the tie between geodetic techniques. The stations analysed all have two or more geodetic techniques (GNSS, SLR or VLBI) and knowing the local ties precisely (measurements between reference points of each technique) is very important so that the processed solutions from each technique can be correctly fitted together to make the Terrestrial Reference Frame.

AGU13 Poster session

AGU13 Poster session

SAC IGS poster

Nacho at the SAC IGS poster

You can get the poster clicking on the image below. The final conclusions are inconclusive for now. It is not possible to recover the radome effect from the global solutions we have generated and analysed. It is very likely that the radome effect is inside the station position time series noise. We will process the data in short baseline solutions in future developments and present the final results in the IGS Workshop 2014.

poster IGS IC AGU13

IGS IC poster at the AGU 2013

While at the AGU2013 I have also participated in the IGS Governing Board Meeting, the IGS Troposphere Working Group Meeting and the IGS Analysis Center Meeting. All the IGS different parts continue to work correctly and are advancing many issues forward.

Regards to all and Happy positioning!


TELECAN project comes to a close

Friday, November 29th, 2013

For the last 12 months our company has been in a collaboration project with the University of Las Palmas in a project called TELECAN.

This activity does not have a GNSS component at this time but it has been a fantastic learning experience for our company in the filed of Earth Observation, and it has brought together disparate members to work together towards a common goal. The partners of the project have been; ULPGC-GPIT, ITC, University of Agadir y SAC.

The final presentation was on 29 Nov, 2013 in the “Jornadas de Teledetección Espacial” and immediately afterwards there was a round table motivating a very interesting discussion based on the presentation.


The project has covered the production, storage, publication and display of Earth Observation products as they are related to renewable energies. This has covered the generation of 13 products, some generic EUMETSAT products, some from a Scientific Application Facility for nowcasting and some dedicated developments by this short project, as shown in the slide below.

TELECAN meteorologia energetica products

TELECAN meteorología energética products

But in truth the biggest component from our part has been capacity building and technology transfer, we see this project as a technology project, even though there has been a scientific component that is not the focus from our point of view. Our company has created a storage and publication system for the many products that the scientists generate in near-real-time. This storage, classification and vision system has been started from scratch internally Layers and GeoServer, two technologies we did not handle before. You can access the service clicking in the image below and find a sample of the products that the TELECAN scientists are generated in near-real-time.

portal web de productos de Meteorologia energetica

portal web de productos de Meteorologia energética

I will link to the presentation once it is loaded in the TELECAN webpage who are the ones authorised to distribute it.

regards to all!!


The CGC continues to grow

Wednesday, January 30th, 2013

Public GNSS data availability for the African continent has been a significant issue for sometime. Due to lack of a good communication infrastructure it is difficult to establish, operate and maintain permanent GNSS stations in our continent. (Yes as a person from the Canary Islands I consider myself geographically African as we have the mainland of the continent less than 100 Km away! politically and culturally we are Spanish, but the map is clear!!)

This short note is simply to inform everyone that the non-profit association I started in the Canary Island: “The Canary GNSS Center (CGC)” continues to uncover and publish publicly available GNSS data. We are mainly a mirroring service, centralizing the distributed African GNSS data into a single server to make life easier for everyone out there doing analysis.

At the CGC as a non-profit we face a significant problem of lack of resources, both time and money and severely limited as out members give what they can of their own efforts to the promotion of the association.payday loans Therefore the promotion of more GNSS data availability has been so far centered on:

1) Promoting GNSS as a simple, effective and inexpensive multidisciplinary technique for use across several disciplines

2) Promoting high-quality installations for the benefit of all. GNSS permanent installation can be very valuable for different research fields as long as proven methods are used and international guidelines followed.

3) Uncovering and publishing African GNSS data sources. It has become clear that the CGC cannot easily promote the installation of new GNSS stations so uncovering and making available existing stations is the next best thing!

Working following these ideas the CGC has promoted the wider publication of stations in Benin and Ethiopa (established with the help of the NGS), plus the permanent African stations of Fugro Seastar (with a 60 days data publishing delay), plus the permanent South African stations of Trignet, many of which aim to become IGS stations, and finally the new permanent Canary Island GNSS network promoted by GRAFCAN, which has so far made public 3 new stations in the Canary islands.

These are a few of the examples recently added to the CGC. You can follow the state of the African stations that the CGC is monitoring and storing through the CGC Information System:


The previous shared information on the CGC is accessible here Previous CGC blog entry.

Good positioning!!

Ignacio Romero (Nacho of the IGS!)