Introduction
Satellite technology has revolutionized our ability to collect accurate weather data. With advancements in satellite technology, weather forecasting has become more accurate, saving lives and property. Two weather satellites, the Global Precipitation Measurement (GPM) and the Tropical Rainfall Measuring Mission (TRMM), have played a crucial role in monitoring global precipitation. They both have unique features, but which performs better? Let's find out.
GPM vs TRMM
Design and Technology
The TRMM satellite was launched in 1997, while the GPM was launched in 2014. While both satellites use similar instruments to detect precipitation, GPM uses advanced radars that can produce 3D images of precipitation. These radars can detect precipitation and snowfall with better accuracy than the TRMM instruments.
TRMM had a lifespan of 17 years, while the GPM is expected to last at least another decade.
Coverage
Both satellites cover the entire globe, but the GPM offers better coverage. Due to its advanced radar technology and increased orbital altitude, GPM offers higher resolution precipitation information than TRMM.
Data Collection Frequency
TRMM gathers data about once every three hours, while GPM does so at half-hour intervals. The increased frequency of GPM data collection provides better real-time weather monitoring.
Precision
GPM's advanced radar technology enables it to detect precipitation rates down to a tenth of a millimeter per hour. TRMM, on the other hand, can only detect precipitation rates up to 0.25 millimeters per hour.
Conclusion
While TRMM has been a reliable weather satellite, GPM's advanced technology and better coverage make it a superior option for precipitation monitoring. GPM provides better precision, higher quality data, and more frequent updates, making it the better alternative.
References
- "Global Precipitation Measurement (GPM)." NASA. https://www.nasa.gov/mission_pages/GPM/main/index.html
- "Tropical Rainfall Measuring Mission (TRMM)." NASA. https://www.nasa.gov/mission_pages/trmm/main/index.html
- "A Guide to Precipitation Measurement Missions and Instruments." Precipitation Education Consortium. https://pmm.nasa.gov/resources/learn-about-gpm/guide-precipitation-measurement-missions-and-instruments