5G Has Already Yielded 12 Phones And Five Chipset Vendors GSA
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Some of the biggest cost savings the General Services Administration expects from its recently launched governmentwide contract vehicle for Salesforce services are likely to come from agencies sharing and reusing application code that vendors have already developed for other federal customers, according to GSA officials.
As part of the agreement, officially dubbed the Salesforce Implementation, Integration and Support Services Blanket Purchase Agreement, applications and services developed by the six partner vendors on the five-year, $503 million contract will be uploaded to a collaboration portal called GSA Labs, where GSA is currently hosting applications it has developed for Salesforce for reuse.
The introduction of a new generation of mass-market chips based on multi GNSS dual frequency measurements, already being commercialized and integrated in smartphones by major manufacturers, is contributing to a new level of positioning accuracy in the mass-market location-based services.
Rinex observations files are post-processed with the MSP3 software, a tool based on a multi-GNSS, implementing a multi frequency PPP-like (with float ambiguity) approach, based on an Extended Kalman Filter with uncombined observations, iono-weighted model and RAIM. It can be fed with raw measurements coming either from the chipset evaluation kit connected to the professional grade antenna or from smartphones, accepting as input either broadcast or final orbital and clock products (MGEX GBM). The evaluation kit was used as a simple source of dual-frequency measurements for static and kinematic users. Thanks to the configurability of the MSP3 tool, several PVT approaches have been applied on the GNSS observations, in order to evaluate the impact on the position accuracy of the phase (pseudorange only or with also the phase), multiple-frequencies (L1/E1 only, L5/E5a only and L1/E1-L5/E5a), multiple-systems (GPS or GPS+Galileo), the quality of the orbit and clock corrections (broadcast or precise).
Kinematic data were also collected in the ESTEC campus with a van for the vehicular scenario. The van equipment included a professional grade antenna, a professional GNSS receiver, a tactical grade IMU system, the chipset evaluation kit and smartphone holders on the windshield to test up to five devices in parallel (Figure 4). Lever arms to the reference anten 153554b96e
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