@inproceedings{TUW-280002, author = {Retscher, G{\"u}nther}, title = {Indoor Altitude Determination Using MEMS-based Sensors in Smartphones}, booktitle = {ION Pacific PNT Meeting}, year = {2019}, publisher = {Institute of Navigation}, numpages = {13}, eid = {49}, isbn = {0-936406-22-4}, doi = {10.33012/2019.16827}, note = {invited; talk: ION Pacific PNT Meeting, Honolulu, Hawaii; 2019-04-08 -- 2019-04-11} }