System modelling of very low Earth orbit satellites for Earth observation

Crisp, Nicholas; Roberts, Peter; Romano, Francesco; Smith, Katherine; Oiko, Vitor Toshiyuki Abrao; Sulliotti-Linner, V.; Hanessian, V.; Herdrich, Georg; García-Almiñana, Daniel; Kataria, D. O.; Seminari, Simon

doi:10.1016/j.actaastro.2021.07.004

Cited by 31 publications

(15 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Following the transmit power and the orbit altitude shown in [44], [45], in this subsection, unless otherwise explicitly specified, the parameters are set as follows: 1) Uplink: A. The Outage Performance over the Uplink Fig.…”

Section: Numerical Resultsmentioning

confidence: 99%

Cooperative Satellite-Aerial-Terrestrial Systems: A Stochastic Geometry Model

Song

Pan

et al. 2023

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

Nowadays, satellite and aerial platforms are playing an important role in realizing global seamless wireless coverage. In this paper, a cooperative satellite-aerial-terrestrial network (SATN) is considered, in which two kinds of relaying links, satellite and aerial relaying links, are used to assist a group of aerial terminals to forward their information to a remote terrestrial destination (D). Specifically, we model these aerial platforms sharing the same frequency band as a Matérn hardcore point process type-II. Also, a group of aerial jammers at D's side is modeled as a Poisson point process. To demonstrate the end-to-end (e2e) performance of the two relaying links, the statistical characteristics of the received signal-to-interference are characterized and then a closed-form expression for the outage probability (OP) over the uplink from the aerial source to the satellite/the aerial relay, the downlink from the satellite/the aerial relay to D, and the inter-aerial relay link are derived. Numerical results are presented to verify the proposed analysis models and compare the outage performance of the considered cooperative SATN with the two relay links under numerous scenarios.

show abstract

Section: Numerical Resultsmentioning

confidence: 99%

Cooperative Satellite-Aerial-Terrestrial Systems: A Stochastic Geometry Model

Song

Pan

et al. 2023

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

show abstract

“…In recent years, spaceflight at altitudes below 250 km is becoming an attractive option [1]. Even if several technical difficulties make it challenging to orbit at such low altitudes, making use of very low Earth orbits (VLEO) would reshape near-Earth space utilization by expanding the operational range and mission capabilities of satellite platforms [1,2]. As VLEO is closer to the Earth's surface, science and Earth observation missions would greatly benefit from improved reconnaissance conditions.…”

Section: Introductionmentioning

confidence: 99%

Rarefied Flow Simulation of Conical Intake and Plasma Thruster for Very Low Earth Orbit Spaceflight

et al. 2022

View full text Add to dashboard Cite

Air-breathing electric propulsion has the potential to enable space missions at very low altitudes. This study introduces to a 0D hybrid formulation for describing the coupled intake and thruster physics of an air-breathing electric propulsion prototype. Model derivation is then used to formally derive main system’s key performance indicators and estimate the figure of merit for the design of rarefied flow air intakes. Achievable performance by conical intake shapes are defined and evaluated by Monte Carlo simulations. Influence of inlet flow variation is assessed by dedicated sensitivity analyses. The set of requirements and optimality conditions derived for the downstream plasma thruster suggest concept feasibility within an achievable performance range.

show abstract

“…Up to now, there are mainly two types of staring imaging satellites in orbit, including the satellites in the geostationary orbit and video satellites in the low orbit [14][15][16]. Figure 1 shows the schematic diagram of the ground gazing attitude control of video satellites.…”

Section: Introductionmentioning

confidence: 99%

Staring Imaging Attitude Tracking Control Laws for Video Satellites Based on Image Information by Hyperbolic Tangent Fuzzy Sliding Mode Control

Pei

2022

Computational Intelligence and Neuroscience

View full text Add to dashboard Cite

This paper studies the staring imaging attitude tracking and control for satellite videos based on image information. An improved temporal-spatial context learning algorithm is employed to extract the image information. Based on this, a hyperbolic tangent fuzzy sliding mode control law is proposed to achieve the attitude tracking and control. Furthermore, the hyperbolic tangent function and fuzzy logic system are introduced into the sliding mode controller. In the experiments, the improved temporal-spatial context learning algorithm is applied for the image information of the space target video sequence captured by Jilin-1 in orbit, where the image information is used as the input of the control loop. Moreover, the proposed method is realized through simulation. Besides, the image change caused by attitude adjustment is achieved successfully, and the target imaging can be located in the center of the image plane to realize the gaze tracking control of the space target effectively.

show abstract

System modelling of very low Earth orbit satellites for Earth observation

Cited by 31 publications

References 43 publications

Cooperative Satellite-Aerial-Terrestrial Systems: A Stochastic Geometry Model

Cooperative Satellite-Aerial-Terrestrial Systems: A Stochastic Geometry Model

Rarefied Flow Simulation of Conical Intake and Plasma Thruster for Very Low Earth Orbit Spaceflight

Staring Imaging Attitude Tracking Control Laws for Video Satellites Based on Image Information by Hyperbolic Tangent Fuzzy Sliding Mode Control

Contact Info

Product

Resources

About