TABLE 1 : 
LANDSAT - 4 PROGRAM FEATURES 
• SIGNIFICANT INCREASE IN DATA RATES (TM) AND VOLUME OVER 
EARLIER LANDSATS 
• 48-HOUR IMAGE PROCESSING TURNAROUND TIME 
• SUB-PIXEL GEOMETRIC ACCURACIES: 
- TEMPORAL REGISTRATION = 0.3 PIXELS 
- GEODETIC RECTIFICATION = 0.5 PIXELS 
• MULTIPLE COMMUNICATION PATHS FOR TELEMETRY, COMMAND 
AND IMAGERY 
- TRACKING AND DATA RELAY SATELLITE SYSTEM (TDRSS) 
- GODDARD SPACE TRACKING AND DATA NETWORK (GSTDN) 
- TRANSPORTABLE GROUND STATION (TGS) 
- FOREIGN GROUND STATIONS 
• NEW MULTI-MISSION MODULAR SPACECRAFT USED 
- PLATFORM IS 10 TIMES MORE STABLE THAN EARLIER LANDSATS 
- GLOBAL POSITIONING SYSTEM EXPERIMENT PROVIDES 
IMPROVED EPHEMERIS DATA FOR GEODETIC ACCURACIES 
- SHUTTLE COMPATIBLE FOR RETRIEVAL 
• NASA TURNOVER TO NOAA IS TO OCCUR IN STAGES: MSS FIRST, THEN TM 
• "LESSONS LEARNED" DURING LANDSAT 2 AND 3 PROCESSING WERE IMPLEMENTED AS 
PART OF LANDSAT-4 GROUND SEGMENT 
- DEVELOPED WITH OPERATIONAL PHILOSOPHY 
- ABILITY TO FULLY EVALUATE OUTPUT PRODUCTS INTERNALLY 
- BUILT IN PARAMETER CHECKS AND CHECK POINTS THROUGH-OUT THE 
PROCESSING CYCLE 
- SINGLE PRIME CONTRACTOR FOR OVERALL DESIGN, DEVELOPMENT, INTEGRATION, 
TEST AND OPERATION 
• MSS INTERFACES WITH EROS DATA CENTER ARE ESSENTIALLY UNCHANGED