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Add comments re geoid for MSL - resolves #182

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Paul
2023-03-20 11:43:24 +00:00
parent 16043c644a
commit 41956745d1
1 changed files with 2 additions and 0 deletions
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src/SparkFun_u-blox_GNSS_Arduino_Library.cpp
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@@ -17466,6 +17466,8 @@ int32_t SFE_UBLOX_GNSS::getAltitude(uint16_t maxWait)
// Get the current altitude in mm according to mean sea level // Get the current altitude in mm according to mean sea level
// Ellipsoid model: https://www.esri.com/news/arcuser/0703/geoid1of3.html // Ellipsoid model: https://www.esri.com/news/arcuser/0703/geoid1of3.html
// Difference between Ellipsoid Model and Mean Sea Level: https://eos-gnss.com/elevation-for-beginners/ // Difference between Ellipsoid Model and Mean Sea Level: https://eos-gnss.com/elevation-for-beginners/
// Also see: https://portal.u-blox.com/s/question/0D52p00008HKDSkCAP/what-geoid-model-is-used-and-where-is-this-calculated
// and: https://cddis.nasa.gov/926/egm96/egm96.html on 10x10 degree grid
int32_t SFE_UBLOX_GNSS::getAltitudeMSL(uint16_t maxWait) int32_t SFE_UBLOX_GNSS::getAltitudeMSL(uint16_t maxWait)
{ {
if (packetUBXNAVPVT == NULL) if (packetUBXNAVPVT == NULL)