Details

Autor(en) / Beteiligte

• Das, Subrata Kumar
• Kolte, Yogesh K.
• Krishna, U. V. Murali
• Hanmante, Harshad S.
• Jha, Abhishek K.
• Deshpande, Sachin

Titel

Measurements of Raindrop Size Distribution Using Collocated X- and Ka-Band Radars in the Western Ghats

Ist Teil von

• IEEE geoscience and remote sensing letters, 2024, Vol.21, p.1-5

Ort / Verlag

Piscataway: IEEE

Erscheinungsjahr

2024

Quelle

IEEE

Beschreibungen/Notizen

• Multifrequency radar retrievals of precipitation characteristics are more accurate than single-frequency radars. This study focuses on retrieving the raindrop size distribution parameters (e.g., median volume drop diameter; <inline-formula> <tex-math notation="LaTeX">D_{\mathbf {0}} </tex-math></inline-formula> and normalized intercept parameter, <inline-formula> <tex-math notation="LaTeX">N_{\mathbf {w}} </tex-math></inline-formula>) from X- and Ka-band radars using the dual-frequency ratio (DFR) technique and quantitatively assesses the retrieved parameter with co-located Joss-Waldvogel Disdrometer (JWD) and global precipitation measurement (GPM) observations. Both radars are collocated at Mandhardev (<inline-formula> <tex-math notation="LaTeX">18.04~^{\circ } </tex-math></inline-formula> N, <inline-formula> <tex-math notation="LaTeX">73.86~^{\circ } </tex-math></inline-formula> E, ~1.3 km AMSL), a high-altitude site in the Western Ghats (WGs), India. The T-matrix scattering simulations are performed at X- and Ka-band to establish the relationship between DFR and <inline-formula> <tex-math notation="LaTeX">D_{\mathbf {0}} </tex-math></inline-formula>. Using <inline-formula> <tex-math notation="LaTeX">D_{\mathbf {0}} </tex-math></inline-formula>, an iterative calculation is performed to calculate the <inline-formula> <tex-math notation="LaTeX">N_{\mathbf {w}} </tex-math></inline-formula>. The <inline-formula> <tex-math notation="LaTeX">D_{\mathbf {0}} </tex-math></inline-formula> values derived from DFR demonstrate good agreement with the disdrometer measurements, while compared to GPM observations, they reveal similar vertical variations but differing magnitudes.