D32 Azores CGPS network and processing – CVUA

From the project kick off several tasks were performed:

§ Acquisition of the GPS permanent station (Trimble 5700 CORS equipped with Dorne Margolin antenna) equipment.

§ Site evaluation for the installation of the monument and receiver accommodation site. Due to the lack of budget for new building construction, an old monument (mark QBN1) was elected for the station installation. For the final decision we considered the local facilities, namely power supply, security, easy access and the possibility of using a telephone line.

§ Equipment installation was performed on February 21, 2003.

§ Maintenance and data downloading. Due to power and pcmcia internal card record failures, some interruptions on data acquisition were experienced. After the installation of additional batteries and a PC connected to the receiver (by the CVUA), some improvements were gained.

§ Rinex observation files are available trough remote access to alf.uac.pt (username: retina and a password).

After the negotiations, instead of 3 GPS receivers only one was bought. NRT CGPS kit was not developed and tested till now in order to integrate the network as previously schedule. Complementary station to the project are: PDEL (IGP/EUREF network) and RIB1 (SOGEO, private company; data will be available after January 2006).

Taking into consideration the last improvements on processing tasks using Bernese software we plan to be able to perform semi-automatic data processing using BPE facilities of Bernese software till end of February 2004. The GMG (Grupo de Monitorização Geodésica) lab of CVARG makes use of the hardware/software specified on Table 2.

Figure 1 – Permanent GPS stations on S. Miguel island.

Photo 1 – Building of the Nordeste County fire department.

Photo 2 – Old antenna configuration setting under SMIG2002 campaign (mark and AT504 antenna).

Photo 3 – Detail of photo 2.

Photo 4 – New configuration setting with a Dorne Margolin Trim antenna with cover (Retina Project).