{'fraction_non_alphanumeric': 0.015789473684210527, 'fraction_numerical': 0.0010526315789473684, 'mean_word_length': 5.256578947368421, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Web-based Interface for On-Demand Processing of Satellite Imagery Archives

We describe a web-based control system for invoking pipelined processes on a large on-line archive of geostationary satellite imagery through a World Wide Web browser interface. Our archive of GMS5 satellite data is stored on a combined RAID and tape silo system, accessible from a cluster of ATM-connected DEC Alpha workstations in Adelaide and Canberra. Our system makes use of parallel and distributed computing software technologies, controlled using Common Gateway Interface and Java code invoked through a WWW server. A number of pipelined processes are scheduled and run on the distributed system. We give some performance measurements for access times and processing times for various parts of our system. We discuss the rapid prototyping advantages and the constraints on functionality, scalability, performance and security that arise from using such technology.