CloudSat's return to the A-Train

Gravseth, Ian; Pieper, B.

doi:10.1504/ijspacese.2013.059269

Cited by 7 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The LR for the MBL is assumed constant at 25 sr, as suggested by HSRL measurements over the ocean (Burton et al, 2012(Burton et al, , 2013. This lidar ratio is slightly higher than the value of 23 sr assumed by Kim et al (2018) and 18±5 sr reported by Groß et al (2013) at Cabo Verde (14.9 • N, 23.5 • W). In contrast, 532 nm Raman lidar observations at Barbados (13 • N, 59…”

Section: One-layer Lidar Ratio (1lr) the Simplest Assumptionmentioning

confidence: 91%

“…SODA AOD is a suitable dataset, as it is collocated with CALIOP by definition and retrievals are possible during both daytime and nighttime for the period 2006-2011. After November 2011 SODA is only available for daytime, as CloudSat has operated in daylight-only operation mode to conserve power (Gravseth and Piepe, 2013). Our goal is to provide an independent CALIOP dataset that can be used for evaluating specific as-pects of the CALIPSO Science Team product, as well as for investigating aerosol-related topics in climate research.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel aerosol extinction coefficients and lidar ratios over the ocean from CALIPSO–CloudSat: evaluation and global statistics

et al. 2019

View full text Add to dashboard Cite

Abstract. Aerosol extinction coefficients (σa) and lidar ratios (LRs) are retrieved over the ocean from CALIPSO's Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) attenuated backscatter profiles by solving the lidar equation constrained with aerosol optical depths (AODs) derived by applying the Synergized Optical Depth of Aerosols (SODA) algorithm to ocean surface returns measured by CALIOP and CloudSat's Cloud Profiling Radar. σa and LR are retrieved for two independent scenarios that require somewhat different assumptions: (a) a single homogeneous atmospheric layer (1L) for which the LR is constant with height and (b) a vertically homogeneous layer with a constant LR overlying a marine boundary layer with a homogenous LR fixed at 25 sr (two-layer method, 2L). These new retrievals differ from the standard CALIPSO version 4.1 (V4) product, as the CALIOP–SODA method does not rely on an aerosol classification scheme to select LR. CALIOP–SODA σa and LR are evaluated using airborne high-spectral-resolution lidar (HSRL) observations over the northwest Atlantic. CALIOP–SODA LR (1L and 2L) positively correlates with its HSRL counterpart (linear correlation coefficient r>0.67), with a negative bias smaller than 17.4 % and a good agreement for σa (r≥0.78) with a small negative bias (≤|-9.2%|). Furthermore, a global comparison of optical depths derived by CALIOP–SODA and CALIPSO V4 reveals substantial discrepancies over regions dominated by dust and smoke (0.24), whereas Aqua's Moderate resolution Imaging Spectroradiometer (MODIS) and SODA AOD regional differences are within 0.06. Global maps of CALIOP–SODA LR feature high values over littoral zones, consistent with expectations of continental aerosol transport offshore. In addition, seasonal transitions associated with biomass burning from June to October over the southeast Atlantic are well reproduced by CALIOP–SODA LR.

show abstract

Section: One-layer Lidar Ratio (1lr) the Simplest Assumptionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Novel aerosol extinction coefficients and lidar ratios over the ocean from CALIPSO–CloudSat: evaluation and global statistics

et al. 2019

View full text Add to dashboard Cite

show abstract

“…However, in April 2011, the first of a series of (Bennett, 2006;Bennett, 2018;Woerner, 2018;Clarke et al, 2022). under-voltage faults occurred, resulting in the activation of an emergency mode that disabled scientific operations and posed a collision threat to nearby orbiters in the A-Train constellation (Nayak, 20122012;Gravseth and Pieper, 2013).…”

Section: Introductionmentioning

confidence: 99%

Assessment of the calendar aging of lithium-ion batteries for a long-term—Space missions

et al. 2023

View full text Add to dashboard Cite

Energy availability is a critical challenge for space missions, especially for those missions designed to last many decades. Space satellites have depended on various combinations of radioisotope thermoelectric generators (RGTs), solar arrays, and batteries for power. For deep space missions lasting as long as 50 + years, batteries will also be needed for applications when there is no sunlight and RTGs cannot support peak power demand due to their insufficient specific power. This paper addresses the potential use of lithium-ion batteries for long-term space missions. Using data collected from the literature and internal experiments, a calendar aging model is developed to assess the capacity fade as a function of temperature, state-of-charge and time. The results for various LIB chemistries are used to identify the best candidate chemistries and determine the conditions, with a focus on low temperatures, that can best enable deep space missions.

show abstract

Monitoring CloudSat reaction wheel friction via ground test and on-orbit data

Gravseth¹

2016

2016 IEEE Aerospace Conference

View full text Add to dashboard Cite

CloudSat's return to the A-Train

Cited by 7 publications

References 1 publication

Novel aerosol extinction coefficients and lidar ratios over the ocean from CALIPSO–CloudSat: evaluation and global statistics

Novel aerosol extinction coefficients and lidar ratios over the ocean from CALIPSO–CloudSat: evaluation and global statistics

Assessment of the calendar aging of lithium-ion batteries for a long-term—Space missions

Monitoring CloudSat reaction wheel friction via ground test and on-orbit data

Contact Info

Product

Resources

About