DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Evaluating differential GNSS techniques for landing the 1st stage of an RLV – with a skydiver experiment

Braun, Benjamin and Markgraf, Markus (2023) Evaluating differential GNSS techniques for landing the 1st stage of an RLV – with a skydiver experiment. 9th International Conference on Astrodynamics Tools and Techniques (ICATT 2023), 12.-16. Jun. 2023, Sopot, Polen.

[img] PDF


Reusable launch vehicles (RLV) in a vertical take-off vertical landing configuration require accurate measurements of the height above the ground during the final descent just before landing. It is proposed to use real-time kinematic positioning (RTK), which is a differential GNSS navigation method requiring a nearby reference GNSS antenna and receiver, to measure the rover’s position with centimetre accuracy. The effects of the engine plume, vibration and multipath are challenging when using this carrier-phase based positioning method on an RLV. Especially the residual differential tropospheric error due to the rover and reference GNSS antennas being at different heights, primarily caused by humidity in the air, may hinder the successful fixing of the carrier phase ambiguities. To gain a better understanding of the RTK performance to be expected on a landing RLV, a skydiver experiment was conducted in April 2022. The skydiver was equipped with a rover GNSS receiver and a helmet with a GNSS antenna on top and an independent integrated navigation system serving as reference. The skydiver reached free fall velocities of up to 385 km/h, which is seen representative of the vertical velocity of an RLV. The paper describes the experiment procedure and the results of the experiment.

Item URL in elib:https://elib.dlr.de/195567/
Document Type:Conference or Workshop Item (Speech)
Title:Evaluating differential GNSS techniques for landing the 1st stage of an RLV – with a skydiver experiment
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Braun, BenjaminUNSPECIFIEDhttps://orcid.org/0000-0002-0193-6607UNSPECIFIED
Date:13 June 2023
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:GNSS, RTK, differential GNSS, skydiver, flight experiment, CALLISTO, VTVL, navigation, radar altimeter
Event Title:9th International Conference on Astrodynamics Tools and Techniques (ICATT 2023)
Event Location:Sopot, Polen
Event Type:international Conference
Event Dates:12.-16. Jun. 2023
Organizer:ESA European Space Research and Technology Centre (ESTEC)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Infrastructure, Flight Dynamics, GPS
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > Space Flight Technology
Deposited By: Braun, Dr. Benjamin
Deposited On:18 Jul 2023 08:44
Last Modified:18 Jul 2023 08:44

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.