2 OBSERVATIONS AND DATA REDUCTION
2.1 Observations
2.2 Data reduction
2.3 Temperature scale and uncertainty

3 THE NH3 DATA
3.1 NH3 emission properties
3.2 Noise characteristics

4 SOURCE FINDING AND MEASUREMENT
4.1 Overview of the source finding procedure
4.2 Cloud measurements

5 THE HOPS NH3 CATALOGUE
5.1 NH3 (1,1) versus (2,2) catalogues
5.2 Catalogue description
5.3 Catalogue completeness

6 ENSEMBLE CLOUD PROPERTIES
6.1 Measured properties
6.2 Kinematic distance and Galactic structure

7 SUMMARY AND FUTURE WORK