Results 51 to 60 of about 32,900 (194)
The Constraint of Crewed Mars Missions Based on Current Radiation Dose Measurements
Space Weather, Volume 24, Issue 3, March 2026.Abstract Crewed missions to Mars will be a milestone of future space exploration programs. However, the absence of Earth's magnetic field leaves astronauts directly exposed to unattenuated energetic particles in deep space, primarily galactic cosmic rays (GCRs), resulting in significantly higher radiation levels and enhanced health risks. Understanding
Chao Zhang +4 more
wiley +1 more source
Remote SensingThis study investigates and verifies the feasibility of the precise point positioning (PPP)-B2b enhanced real-time (RT) precise orbit determination (POD) of low Earth orbit (LEO) satellites.
Yali Shi +5 more
doaj +1 more source
Widespread Higher Soil Respiration Rates at Nighttime Than Daytime Across Global Forest Ecosystems
Global Change Biology, Volume 32, Issue 3, March 2026.Soil respiration is the second largest carbon flux between terrestrial ecosystems and the atmosphere, yet its diel dynamics remain poorly understood. By synthesizing continuous, in situ soil respiration measurements from forests worldwide, we reveal widespread higher soil respiration rates at night than during the day.
Heng Huang +8 more
wiley +1 more source
Sensors, 2014 More and more Global Navigation Satellite Systems (GNSSs) have been developed and are in operation. Before integrating information on various GNSSs, the differences between the various systems must be studied first. This research focuses on analyzing the
Shau-Shiun Jan, An-Lin Tao
doaj +1 more source
ABTRAJ on-site tracking prediction program [PDF]
, 1969 Computer program, ABTRAJ, provides Deep Space Network tracking stations with the capability of generating spacecraft predictions with on-site computers.
Berman, A. L., Leppla, F. B.
core +1 more source
, 2003 The magnetic Cataclysmic Variable (mCV) V1432 Aql (RX 1940.1-1025) belongs to the four-member subclass of near-synchronous polars with a slight non-synchronism ( 10 R_wd (68% confidence).Comment: 12 pages, 10 figures, 6 tables accepted by A&
Benlloch, S. +7 more
core +1 more source
A Neural Network Model of Equatorial Electric Field Structures in the Inner Magnetosphere
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Enabled by state‐of‐the‐art electric field measurements from the Van Allen Probes and careful calibration of the high‐quality data, we developed the first machine‐learning based inner‐magnetosphere electric field model, which covers L = 2.5–6.0 within 20° ${}^{\circ}$ around the magnetic equator.
M. Hua +6 more
wiley +1 more source
Photometry of the SW Sex-type nova-like BH Lyncis in high state
, 2006 Aims: We present a photometric study of the deeply eclipsing SW Sex-type nova-like cataclysmic variable star BH Lyn Methods: Time-resolved V-band CCD photometry was obtained for seven nights between 1999 and 2004.
Bonnet-Bidaud +21 more
core +1 more source
Confirmation of a Non‐Transiting Planet in the Habitable Zone of the Nearby M Dwarf L 98‐59
Astronomische Nachrichten, Volume 347, Issue 2, February 2026.ABSTRACT Only 40 exoplanetary systems with five or more planets are currently known. These systems are crucial for our understanding of planet formation and planet‐planet interaction. The M dwarf L 98‐59 has previously been found to show evidence of five planets, three of which are transiting.
Paul I. Schwarz +2 more
wiley +1 more source
Improving BDS broadcast ephemeris accuracy using ground-satellite-link observations
Satellite Navigation, 2022 The BeiDou Navigation Satellite System (BDS) employs a hybrid constellation including GEO (Geosynchronous Earth Orbit), IGSO (Inclined Geosynchronous Orbit), and MEO (Medium Earth Orbit) satellites, where the GEO and IGSO satellites are critical to ...
Junping Chen +4 more
doaj +1 more source