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\centerline{\bf Some Marine Applications of Satellite}
\centerline{\bf and Airborne Remote Sensing}
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\centerline{ \bf  \uppercase{Introduction}}
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This package of textual and disc-based material was prepared as part of Unesco's training and education in marine science (TREDMAR) programme.  For the present work two tasks were set: (i) to make available a tool for the interpretation of remotely sensed
 data which allows the topic to be taught using low cost terminals rather than
 specialised equipment, and then  (ii), to provide a means by which those interested
 in the teaching of oceanography may exchange, assess, criticise and enhance
 lessons based on this tool.

 Two outputs have resulted from the project.  One is a suite of image processing
 software and the other a series of lessons based on that software.  Both are
 described in this booklet.

 BILKO is the name given to the image processing software.  It provides user-friendly access to image data from satellite and airborne sensors and the
 opportunity for extensive manipulation of images.  BILKO is menu driven and
 fully supported by an on-line help instruction set so is suitable for use by
 students who have no previous computing experience.  The tasks which
 can be performed are those appropiate for the analysis and interpretation of 
 ocean images.

 To run BILKO, the minimum equipment required is an IBM  personal
 computer  or close  compatible running on MS-DOS, with 512k RAM and a single drive taking 360k
 discs.  It must be fitted with a colour monitor and a graphics adapter to EGA
 standard.  It is easier to run the programme with a machine having twin floppy
 drives or, much better, a hard disc.  As supplied with this booklet BILKO is
 held on a single $1.2$Mbyte $5{1\over4}^{\prime\prime}$ floppy disc.  Demonstration lessons fill a
 further four such discs.

 Lessons using BILKO are based on image datasets coupled with a teaching text.
 Those written for this booklet are designed to lead students through a sequence
 of tasks which demonstrate the interpretation of image data in oceanographic
 science.  As the intended users are students of marine science, emphasis has
 been placed on the application of data rather than on the understanding of
 physical processes.  To this end, most images have been pre-processed from the
 raw satellite data into calibrated datasets of oceanic variables and resampled
 onto geographic coordinates with the distortion of the viewing geometry
 removed.

 The contents of this booklet are divided into three principal sections.  They
 comprise an introductory tutorial on BILKO; seven practical lessons in satellite
 oceanography; and a worksheet demonstrating how to create a calibrated image
 from raw data.

 Section 1 is an introduction to BILKO.  It lists the programme commands and
 illustrates their use.  This is a key reference section as all lessons are
 derivative to it.

 Lessons developed for third-year undergraduate students at the University of
 Southampton form the body of the second section.  They are the practical
 element of a course on Oceanography from Space designed for non-specialists
 with backgrounds in the physical, chemical and biological sciences.  Although
 designed to be studied in sequence the text has been structured so that lessons
 are self-contained.  They can thus be copied and issued for individual use
 during practical sessions.

 A different type of lesson is provided in Section 3.  The single lesson there
 is designed for physical science students who wish to explore in more detail
 one of the procedures used to create the calibrated images used in satellite
 oceanography.  It shows in detail how sea-surface temperatures are derived from
 the raw data generated by an infra-red scanner.

 The final section of this booklet is intended for teachers who would like to
 take part in future stages of the current Unesco programme.  It suggests some
 means by which individuals can take part in the programme, lists contacts who
 are willing to help in putting new lessons into BILKO format and indicates some
 of the ways in which the programme may expand.  A strong and positive response
 to the ideas developed in the  Further Action  section could lead to the development of a co-operative network among interested marine remote sensing teachers, allowing -- to mutual benefit -- the exchange of
 ideas, techniques and artefacts is simple and works to mutual advantage.
 Ultimately, this is the motivation which underpins the production of the
 present module and could lead it to being the first of a series.

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