Update earth_observation_based_output.md

docs/earth_observation_based_output.md

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-# Earth Observation based output
+## 1 Definition
+
+(indicative level 4 and beyond) represent a higher level of processing and integration that goes beyond basic data processing. These outputs are often designed specifically for policy or decision-making needs, and can be categorized into sub-categories:
+
+- Outputs from models/Model Integration involves using EO products as inputs in numerical models or combining them with other data sources in modeling frameworks. 
+
+### Examples 
+-Crop yield predictions
+- Forest fire risk assessment
+- Flood prediction models 
+
+- Indicator-Based Outputs:  EO products are transformed through specialized algorithms (including statistical methods, machine learning, and pattern recognition) to create meaningful metrics based on spatio-temporal analysis.
+### Examples 
+- Land cover change
+
+- Outputs from Reanalysis: involves merging EO products with other observations and models, creating consistent long-term records of past atmospheric, oceanic, and land surface conditions, and filling gaps through data assimilation techniques.
+
+### Examples 
+- Climate model reconstructions
+- Long-term temperature time series 
+
+### Sources 
+- KCEO