Abstract
| Original language | English |
|---|---|
| Title of host publication | 30th International Technical Meeting of the Satellite Division of the Institute of Navigation |
| Subtitle of host publication | ION GNSS 2017 |
| Publisher | Institute of Navigation ION |
| Pages | 3353-3367 |
| Number of pages | 15 |
| Volume | 5 |
| ISBN (Electronic) | 978-151-08533-1-7 |
| Publication status | Published - 2017 |
| MoE publication type | A4 Article in a conference publication |
| Event | 30th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2017 - Portland, United States Duration: 25 Sep 2017 → 29 Sep 2017 Conference number: 30 |
Conference
| Conference | 30th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2017 |
|---|---|
| Abbreviated title | ION GNSS 2017 |
| Country | United States |
| City | Portland |
| Period | 25/09/17 → 29/09/17 |
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Receiver-level robustness concepts for EGNSS timing services. / Kirkko-Jaakkola, Martti; Thombre, Sarang; Honkala, Salomon; Söderholm, Stefan; Kaasalainen, Sanna; Kuusniemi, Heidi; Zelle, Hein; Veerman, Henk; Wallin, Anders; Aarmo, Kjell Arne; Boyero, Juan Pablo.
30th International Technical Meeting of the Satellite Division of the Institute of Navigation: ION GNSS 2017. Vol. 5 Institute of Navigation ION, 2017. p. 3353-3367.Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
TY - GEN
T1 - Receiver-level robustness concepts for EGNSS timing services
AU - Kirkko-Jaakkola, Martti
AU - Thombre, Sarang
AU - Honkala, Salomon
AU - Söderholm, Stefan
AU - Kaasalainen, Sanna
AU - Kuusniemi, Heidi
AU - Zelle, Hein
AU - Veerman, Henk
AU - Wallin, Anders
AU - Aarmo, Kjell Arne
AU - Boyero, Juan Pablo
PY - 2017
Y1 - 2017
N2 - GNSS-based time transfer is utilized in various critical infrastructures as it provides important advantages which are being increasingly exploited. In this paper, we present the various implementation options for robust timing service concepts based on European GNSS (EGNSS), i.e., Galileo and EGNOS, that are expected to further foster the use of EGNSS timing; this concept can make use of the redundancy of measurements and of available GNSS constellations. The stability properties of the local oscillator, which are known to the designer, are also exploited. The algorithms are developed to account for cases where several measurement faults occur simultaneously, which is a possible scenario in land-based reception conditions. Furthermore, we derive time protection level equations to quantify the integrity of the GNSS time solution as a function of the false alarm and missed detection probabilities as well as the maximum number of simultaneous outliers to be accounted for. Some of the considered fault scenarios can only be detected but not rectified by the algorithms: in such case, holdover, i.e. processing based on the local oscillator alone, is triggered. Thus, the performance in these scenarios is dependent on the stability of the local oscillator; in this paper, the analysis is based on a low-cost temperature-compensated crystal oscillator. The effect of the robustness concepts is illustrated with a set of experiments which show that when implemented in a timing GNSS receiver, the algorithms presented can deal with failures that affect individual satellites or even an entire constellation. Local disturbances affecting the receiver can also be effectively detected. Specifying EGNSS timing as proper services along with well-defined procedures for testing receiver compliance paves the road for standardizing and certifying robust EGNSS timing receivers, which would be beneficial for many applications and in particular in safety or liability critical use cases.
AB - GNSS-based time transfer is utilized in various critical infrastructures as it provides important advantages which are being increasingly exploited. In this paper, we present the various implementation options for robust timing service concepts based on European GNSS (EGNSS), i.e., Galileo and EGNOS, that are expected to further foster the use of EGNSS timing; this concept can make use of the redundancy of measurements and of available GNSS constellations. The stability properties of the local oscillator, which are known to the designer, are also exploited. The algorithms are developed to account for cases where several measurement faults occur simultaneously, which is a possible scenario in land-based reception conditions. Furthermore, we derive time protection level equations to quantify the integrity of the GNSS time solution as a function of the false alarm and missed detection probabilities as well as the maximum number of simultaneous outliers to be accounted for. Some of the considered fault scenarios can only be detected but not rectified by the algorithms: in such case, holdover, i.e. processing based on the local oscillator alone, is triggered. Thus, the performance in these scenarios is dependent on the stability of the local oscillator; in this paper, the analysis is based on a low-cost temperature-compensated crystal oscillator. The effect of the robustness concepts is illustrated with a set of experiments which show that when implemented in a timing GNSS receiver, the algorithms presented can deal with failures that affect individual satellites or even an entire constellation. Local disturbances affecting the receiver can also be effectively detected. Specifying EGNSS timing as proper services along with well-defined procedures for testing receiver compliance paves the road for standardizing and certifying robust EGNSS timing receivers, which would be beneficial for many applications and in particular in safety or liability critical use cases.
UR - http://www.scopus.com/inward/record.url?scp=85047846079&partnerID=8YFLogxK
M3 - Conference article in proceedings
VL - 5
SP - 3353
EP - 3367
BT - 30th International Technical Meeting of the Satellite Division of the Institute of Navigation
PB - Institute of Navigation ION
ER -