nhật xạ kí
Definition
- Noun:
- Heliograph: An instrument that records the duration and intensity of sunlight over a period of time, typically using a photosensitive element or a burning glass to mark a chart.
- Pyranograph / Sunshine Recorder: A specific type of instrument for recording solar radiation, particularly the total (global) radiation from the sun and sky onto a horizontal surface.
Usage Examples
- Noun:
- Dữ liệu từ nhật xạ kí rất quan trọng cho nghiên cứu khí hậu. (Data from the sunshine recorder is very important for climate research.)
- Nhà khí tượng học kiểm tra bản ghi của nhật xạ kí mỗi ngày. (The meteorologist checks the heliograph's record every day.)
Advanced Usage
- The term is technical and used almost exclusively in scientific contexts such as meteorology, climatology, and solar energy studies. It refers to the instrument itself, not the act of recording.
Variants and Related Words
- Máy ghi bức xạ mặt trời: A descriptive Vietnamese phrase meaning "solar radiation recorder," often used synonymously with .
- Campbell-Stokes sunshine recorder: A famous and traditional type of that uses a glass sphere to burn a trace onto a calibrated card.
Synonyms
- Sunshine recorder
- Heliograph
- Pyranograph (specifically for measuring total solar radiation)
Notes on Meaning
- The word is a compound Sino-Vietnamese term: "nhật" (sun), "xạ" (radiation), "kí" (to record). It is a highly specialized scientific instrument and is not used in everyday conversation.