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function dataFilter = SetDataFilter |
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% dataFilter = SetDataFilter |
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% Function to set data filter for use with ReadGnssLogger |
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% This function has no inputs. Edit it directly to change the data filter |
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% |
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% Rule for setting dataFilter: |
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% dataFilter{i} is a cell with a string with a valid matlab expression, |
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% containing one of the 'Raw' headings in the GnssLogger log file |
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% and where any comparison is against a scalar value |
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% |
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% the heading type may be repeated, for example, |
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% dataFilter{i} = 'ConstellationType==1 | ConstellationType==3'; |
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% but you may not have more than one heading type in a single dataFilter{i} cell |
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%Author: Frank van Diggelen |
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%Open Source code for processing Android GNSS Measurements |
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%filter for fine time measurements only <=> uncertainty < 10 ms = 1e7 ns |
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dataFilter{1} = 'BiasUncertaintyNanos < 1e7'; |
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%you can create other filters in the same way ... |
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%for example, suppose you want to remove Svid 23: |
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% dataFilter{end+1} = 'Svid~=23'; |
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%or suppose you want to keep only Svid 2,5,10, & 17 |
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% dataFilter{end+1} = 'Svid==2 | Svid==5 | Svid==10 | Svid==17'; |
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% NOTE: you *cannot* use 'any(Svid)==[2,5,10,17]' because Svid refers to a |
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% vector variable and you must compare it to a scalar. |
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%keep only Svid 2 |
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% dataFilter{end+1} = 'Svid==2'; |
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%limit to GPS only: |
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dataFilter{end+1} = 'ConstellationType==1'; |
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%ConstellationType values are defined in Android HAL Documentation, gps.h, |
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% typedef uint8_t GnssConstellationType; |
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% #define GNSS_CONSTELLATION_UNKNOWN 0 |
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% #define GNSS_CONSTELLATION_GPS 1 |
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% #define GNSS_CONSTELLATION_SBAS 2 |
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% #define GNSS_CONSTELLATION_GLONASS 3 |
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% #define GNSS_CONSTELLATION_QZSS 4 |
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% #define GNSS_CONSTELLATION_BEIDOU 5 |
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% #define GNSS_CONSTELLATION_GALILEO 6 |
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%Example of how to select satellites from GPS and GLONASS: |
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% dataFilter{end+1} = 'ConstellationType==1 | ConstellationType==3'; |
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%You may use the heading value (e.g. 'ConstellationType') more than once, |
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%so long as you dont use different heading types in one dataFilter{} entry |
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%bitwise data filters |
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%some fields are defined bitwise, including: State, AccumulatedDeltaRangeState |
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% |
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% GnssMeasurementState values are defined in Android HAL Documentation, gps.h, |
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% typedef uint32_t GnssMeasurementState; |
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% #define GNSS_MEASUREMENT_STATE_UNKNOWN 0 |
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% #define GNSS_MEASUREMENT_STATE_CODE_LOCK (1<<0) |
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% #define GNSS_MEASUREMENT_STATE_BIT_SYNC (1<<1) |
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% #define GNSS_MEASUREMENT_STATE_SUBFRAME_SYNC (1<<2) |
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% #define GNSS_MEASUREMENT_STATE_TOW_DECODED (1<<3) |
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% #define GNSS_MEASUREMENT_STATE_MSEC_AMBIGUOUS (1<<4) |
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% #define GNSS_MEASUREMENT_STATE_SYMBOL_SYNC (1<<5) |
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% #define GNSS_MEASUREMENT_STATE_GLO_STRING_SYNC (1<<6) |
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% #define GNSS_MEASUREMENT_STATE_GLO_TOD_DECODED (1<<7) |
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% #define GNSS_MEASUREMENT_STATE_BDS_D2_BIT_SYNC (1<<8) |
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% #define GNSS_MEASUREMENT_STATE_BDS_D2_SUBFRAME_SYNC (1<<9) |
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% #define GNSS_MEASUREMENT_STATE_GAL_E1BC_CODE_LOCK (1<<10) |
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% #define GNSS_MEASUREMENT_STATE_GAL_E1C_2ND_CODE_LOCK (1<<11) |
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% #define GNSS_MEASUREMENT_STATE_GAL_E1B_PAGE_SYNC (1<<12) |
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% #define GNSS_MEASUREMENT_STATE_SBAS_SYNC (1<<13) |
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%Example of how to use dataFilter for GnssMeasurementState 'State' bit fields: |
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%filter on GPS measurements with Code lock & TOW decoded: |
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dataFilter{end+1} = 'bitand(State,2^0) & bitand(State,2^3)'; |
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% GNSS_MEASUREMENT_STATE_CODE_LOCK & GNSS_MEASUREMENT_STATE_TOW_DECODED |
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% GnssAccumulatedDeltaRangeState values are defined gps.h, |
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% typedef uint16_t GnssAccumulatedDeltaRangeState; |
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% #define GNSS_ADR_STATE_UNKNOWN 0 |
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% #define GNSS_ADR_STATE_VALID (1<<0) |
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% #define GNSS_ADR_STATE_RESET (1<<1) |
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% #define GNSS_ADR_STATE_CYCLE_SLIP (1<<2) |
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% |
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%Example of how to use dataFilter for ADR State bit fields: |
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% get AccumulatedDeltaRangeState values that are valid |
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% dataFilter{end+1} = 'bitand(AccumulatedDeltaRangeState,1)'; |
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end %end of function SetDataFilter |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% Copyright 2016 Google Inc. |
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% |
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% Licensed under the Apache License, Version 2.0 (the "License"); |
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% you may not use this file except in compliance with the License. |
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% You may obtain a copy of the License at |
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% |
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% http://www.apache.org/licenses/LICENSE-2.0 |
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% |
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% Unless required by applicable law or agreed to in writing, software |
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% distributed under the License is distributed on an "AS IS" BASIS, |
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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% See the License for the specific language governing permissions and |
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% limitations under the License. |
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