Feasibility study for future space-borne coherent doppler wind lidar, part 1: Instrumental overview for global wind profile observation

Ishii Shoken, Baron Philippe, Aoki Makoto, Mizutani Kohei, Yasui Motoaki, Ochiai Satoshi, Sato Atsushi, Satoh Yohei, Kubota Takuji, Sakaizawa Daisuke, OKI Riko, Okamoto Kozo, Ishibashi Toshiyuki, Tanaka Taichu Y, Sekiyama Tsuyoshi T, Maki Takashi, Yamashita Koji, Nishizawa Tomoaki, Satoh Masaki, Iwasaki Toshiki

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

A working group is studying the feasibility of a future Japanese space-borne coherent Doppler wind lidar (CDWL) for global wind profile observation. This study is composed of two companion papers: an instrumental overview of the space-borne CDWL for global wind profile observation (Part 1), and the wind measurement performance (error and bias) investigated using a full-fledged space-borne CDWL simulator (Part 2). This paper aims to describe the future space-borne CDWL in terms of technical points and observation user requirements. The future mission concept is designed to have two looks for vector wind measurement with vertical resolutions of 0.5 (lower troposphere: 0 – 3 km), 1 (middle troposphere: 3 – 8 km), and 2 km (upper troposphere: 8 – 20 km) and horizontal resolution of < 100 km along a satellite. The altitude and orbit of the satellite arediscussed from a scientific viewpoint. The candidate altitude and orbit of the satellite are 220 km and an inclination angle of 96.4° (polar orbit) or 35.1° (low-inclination-angle orbit). The technical requirements of the space-borne CDWL are a single-frequency 2-μm pulse laser with an average laser power of 3.75 W, two effective 40-cm-diameter afocal telescopes, a wide-bandwidth (> 3.4 GHz) detector, a high-speed analog-to-digital converter, and a systematic lidar efficiency of 0.08. The space-borne CDWL looks at two locations at a nadir angle of 35° at two azimuth angles of 45° and 135° (225° and 315°) along the satellite track. The future space-borne CDWL wind profile observation will fill the gap of the current global wind observing systems and contribute to the improvement of the initial conditions for numerical weather prediction (NWP), the prediction of typhoons and heavy rain, and various meteorological studies.

Original languageEnglish
Pages (from-to)301-317
Number of pages17
JournalJournal of the Meteorological Society of Japan
Volume95
Issue number5
DOIs
Publication statusPublished - 2017

Keywords

  • Doppler wind lidar
  • Earth observation satellite
  • Global wind profile observation
  • Lidar simulator
  • Numerical weather prediction
  • Observing system simulation experiment

ASJC Scopus subject areas

  • Atmospheric Science

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