ESA Open Invitation To Tender AO8524
Open Date: 27/01/2016
Closing Date: 09/03/2016

Status: ISSUED
Reference Nr.: 15.1ET.21
Prog. Ref.: TRP
Budget Ref.: E/0901-01 – TRP
Special Prov.: BE+DK+FR+DE+IT+NL+ES+SE+CH+GB+IE+AT+NO+FI+PT+GR+LU+CZ+RO+PL+EE+HU
Tender Type: C
Price Range: 100-200 KEURO
Establishment: ESTEC
Directorate: Directorate of Technical & Quality Manag
Department: Electrical Engineering Department
Division: RF Payload Systems Division
Contract Officer: Fabrizi, Lavinia
Last Update Date: 27/01/2016
Update Reason: Tender issue

This study will develop techniques and algorithms for the off-line calibration of the GSS/satellite HW delays, affecting the code-phase and carrier-phase observables. This activity will explore techniques for both relative and absolute calibration. The GSS HW delays (with contributions which make them elevation and azimuth dependent) affecting the code-phase and carrier-phase observables, introduce very low frequency tracking errors (theoretical period, if tracking was continuous, equal to the satellite revisit time, which is 10 days for Galileo and 1 day for GPS) with amplitudes as high as 20 cm, which cannot be filtered efficiently by the Ground Segment Processing Facilities IPF, OSPF, MSF. These tracking errors play an important role on the performance of the above mentioned facilities, especially on the real-time integrity determination process at IPF level, and on the construction of the reference orbit and clock at MSF level. Analogously these tracking errors could play as well an important role on the performance of the EGNOS V3 processing facilities (CPF-PS, CPF-CS). The calibration of the GSS HW delays, affecting the code-phase and carrier-phase observables, can be achieved off-line, by different techniques and algorithms.

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