name: SBAS
full_form: Space Based Augmentation System
context: Nominal accuracy requirement verifies the accuracy of A-GNSS position estimate in ideal conditions. The primarily aim of the test is to ensure good accuracy for a position estimate when satellite signal conditions allow it. This test case verifies the performance of the first position estimate. In this requirement 6 satellites are generated for the terminal for single constellation and dual constellation, and 7 satellites are generated for triple constellation. If SBAS is to be tested one additional satellite shall be generated. AWGN channel model is used. The number of simulated satellites for each constellation is as defined in Table 6.2-2. Table 6.2-1: Test parameters If QZSS is supported, one of the GPS satellites will be replaced by a QZSS satellite with respective signal support. If SBAS is supported, the SBAS satellite with the highest elevation will be added to the scenario. If NavIC is supported, the NavIC satellite with the highest elevation will be added to the scenario.
description: Space Based Augmentation System (SBAS) enhances the accuracy and reliability of Global Navigation Satellite Systems (GNSS) like GPS by transmitting corrections and integrity information through geostationary satellites.
explanation: The text describes SBAS as a system that improves GNSS performance, specifically mentioning its role in providing corrections and integrity information via satellites. This directly aligns with the function of satellite navigation systems.
section_title: 6.2Nominal accuracy
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