A5081628367- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Space Science and Extraterrestrial Life
- Spaceflight effects on biology
- Scientific Research and Discoveries
- Aerospace Engineering and Energy Systems
- Ionosphere and magnetosphere dynamics
- Gas Dynamics and Kinetic Theory
- Aeolian processes and effects
- Geophysics and Gravity Measurements
- Spacecraft Design and Technology
- Spacecraft Dynamics and Control
Finnish Meteorological Institute
2021-2024
Abstract The Mars 2020 mission rover “Perseverance”, launched on 30 July by NASA, landed successfully 18 February 2021 at Jezero Crater, (Lon. E 77.4509° Lat. N 18.4446°). landing took place solar longitude Ls = 5.2°, close to start of the northern spring. Perseverance's payload includes relative humidity sensor MEDA HS (Mars Environmental Dynamics Analyzer Humidity Sensor), which operations, performance, and first observations from sol 80 410 (Ls 44°–210°) operations we describe. measured...
Abstract The Mars2020 Perseverance Rover landed successfully on the Martian surface Jezero Crater floor (18.44°N, 77.45°E) at solar longitude, L s , ∼5° in February 2021. Since then, it has produced highly valuable environmental measurements with a versatile scientific payload including MEDA (Mars Environmental Dynamics Analyzer) suite of sensors. One systems is PS pressure sensor system, which weighs 40 g and an estimated absolute accuracy better than 3.5 Pa resolution 0.13 Pa. We present...
Abstract Diurnal solar radiation causes global oscillations in pressure, temperature, and wind fields, known as atmospheric tides, which are further modified by topography, surface properties, dust loading. Hence, the tides a combination of sun‐synchronous non that propagate around planet both eastward westward. In Martian tropics, dominate daily pressure variations on surface. Therefore, observing platforms extremely useful for detailed analysis tides. this investigation, we analyze diurnal...
The Mars2020 Perseverance Rover landed successfully on the Martian surface Jezero Crater floor (18.44°N, 77.45°E) at solar longitude, $L_s$, $\sim$5 in February 2021. Since then it has produced highly valuable environmental measurements with a versatile scientific payload including MEDA (Mars Environmental Dynamics Analyzer) suite of sensors. One systems is PS pressure sensor system which weighs 40 grams and an estimated absolute accuracy better than 3.5 Pa resolution 0.13 Pa. We present...
Diurnal solar radiation forces global oscillations in pressure, temperature, and wind fields. They are called atmospheric or thermal tides additionally modified by topography, surface properties, absorber consentration. propagate around the planet periods that integer fractions of a day only relevant upper atmosphere on Earth, but they represent very large part circulation Mars. First two harmonic components (diurnal semi-diurnal), with 24 12 hr at locations InSight Mars Science Laboratory...
Cyclic absorption of solar radiation generates oscillations in atmospheric fields. These are called or thermal tides, which furthermore modified by topography and surface properties. This leads to a complex mix sun-synchronous non tides that propagate around the planet eastward westward. study focuses on analyzing ter-diurnal component (period 8 hr) from pressure observations Mars Science Laboratory (MSL), InSight, Viking Lander (VL) 1, VL2. General Circulation Model (GCM) results used...
IntroductionCyclic absorption of solar radiation generates oscillations in atmospheric fields. These are called or thermal tides, which furthermore modified by topography, surface properties, and absorber concentration. This leads to a complex mix sun-synchronous non tides that propagate around the planet eastward westward. A major aspect study is obtain some global insight into Martian ter-diurnal seen at very small collection lander sites using Mars Climate Database (MCD) General...
Abstract. An extensive sensitivity analysis was performed for a horizontally homogeneous and hydrostatic 1-D column model at the Mars Science Laboratory (MSL) location. Model experiments were compared with observations from Curiosity Rover Environmental Monitoring Station humidity (REMS-H) device ChemCam. Based on our earlier investigations, surface temperature pressure, dust optical depth (τ), precipitable water content (PWC) parameters that we investigated analysis. Our suggests most...
Abstract Cyclic absorption of solar radiation generates oscillations in atmospheric fields. These are called or thermal tides, which furthermore modified by topography and surface properties. This leads to a complex mix sun‐synchronous non‐sun‐synchronous tides that propagate around the planet eastward westward. study focuses on analyzing ter‐diurnal component (period 8 hr) from pressure observations Mars Science Laboratory (MSL), InSight, Viking Lander (VL) 1, VL2. General Circulation Model...
Abstract. An extensive sensitivity analysis was performed for a horizontally homogeneous and hydrostatic 1-D column model at the Mars Science Laboratory (MSL) location. Model experiments were compared with observations from Curiosity Rover Environmental Monitoring Station humidity (REMS-H) device. Based on our earlier investigations, surface temperature pressure, dust optical depth (τ) precipitable water content (PWC) initial parameters that we investigated by analysis. Our suggests most...
Diurnal solar radiation causes global oscillations in pressure, temperature, and wind fields, known as atmospheric tides, which are further modified by topography, surface properties, dust loading. Hence, the tides a combination of sun-synchronous non that propagate around planet both eastward westward. In Martian tropics, dominate daily pressure variations on surface. Therefore, observing weather stations extremely useful for detailed analysis tides. this investigation, we analyze diurnal...
AbstractMartian dust storms can obscure the lower reaches of atmosphere from orbiting spacecraft and at same time upper landed spacecraft. Inferring paths wind-blown particles their spatial distributions in may help understand role winds distributing on surface. We describe a simple but useful transport model that calculates multiple using wind data imported Mars climate model. plan to use our around how vertical distribution above landing site change over during storm, e.g. with column...
AbstractIn 1997 Pathfinder descended on its parachute through the nocturnal boundary layer of Mars. early in morning a few hours before possible formation low level jet [1]. We use an EDL trajectory model to simulate landing and jettisoned hardware together with HiRISE images site we are able constrain wind speeds directions during descent.BackgroundPathfinder deployment occured at altitude around 10 km. The heat shield was 15 s later. Shortly afterwards enveloped deflated airbags lowered...