ESA Open Invitation To Tender AO8705
Open Date: 16/06/2016
Closing Date: 11/08/2016 13:00:00

Status: ISSUED
Reference Nr.: 16.154.15
Prog. Ref.: EGEP1
Budget Ref.: E/0360-10 - EGEP1
Tender Type: C
Price Range: KEURO
Products: Ground Segment / Ground Station / Baseband equipment / Telemetry and Telecommand equipment, Tracking, Ranging and Doppler measurement equipment, CODECS, ...
Technology Domains: Onboard Data Systems / Payload Data Processing / System Technologies for Payload Data Processing
Establishment: ESTEC
Directorate: Dir. Galileo Prog & Nav related activities
Department: EGNOS & GNSS Evolution Programme Department
Contract Officer: Mezzadri, Monica
Industrial Policy Measure: N/A - Not apply
Last Update Date: 23/06/2016
Update Reason: Loaded a new Clarification (English version)

As a system providing timing services, Galileo disseminates an accurate prediction of the offset between its own timescale (Galileo System Time, GST) and Coordinated Universal Time (UTC). The offset between GST and the GPS Timescale is also disseminated to guarantee interoperability between the two systems. The relationship between these timescales shall therefore be properly estimated to within a known uncertainty. One of the key contributor in this estimation is the receiver chain (GNSS receiver + antenna), whose internal delays and delays to the user clock shall be accurately determined. Most calibration procedures in place today, in particular the ones recommended by the Bureau International des Poids et Mesures (BIPM), are based on relative methods and applicable to GPS and GLONASS. Alternative methods (e.g. based on absolute delays measurements) are also under development. The activity shall start with are view of the state-of-the art methods and techniques, as well as their applicability to Galileo. Second, a procedure shall be developed with the goal to achieve an uncertainty in the receiver chain delay measurement of one nanosecond, with minimum impact on the link operation and associated logistics (need for dedicated equipment, access and interface to the site. The procedure shall also include the proposed verification approach (e.g. comparison against other methods). A calibration campaign shall be executed on a number of representative receiver chains (test equipment and tools available at ESTEC can be made available). Test results shall be reviewed and analysed in accordance with the verification approach in order to validate the procedure and demonstrate compliance with the targeted performance. Procurement Policy: C(4) = Activities in open competition, subject to the SME Subcontracting clause. For additional information please go to EMITS news "Industrial Policy measures for non-primes, SMEs and RD entities in ESA programmes".

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