Build a space program around useful mountain observations

Bhutan’s Space Strategy 2034 was presented at GovTech’s Space Forum in November 2024 as a ten-year roadmap. Satellite development is one part of that effort; education, ground infrastructure and applications also shape whether space technology becomes useful. Bhutan Space Week provides another route into the field through mission ideas, practical activities and discussions involving students and professionals.

A national program can use observations from other countries while developing its own spacecraft. Ownership of a satellite and the ability to interpret its measurements answer different questions. In a mountainous landscape, a useful result may require local knowledge of valleys, roads, weather and the people who will use a map. Purchasing or building hardware does not automatically supply that interpretation.

The Bhutan GLOF Project used observations from Japan’s ALOS spacecraft to improve glacier and glacial-lake inventories. JAXA describes a collaboration involving Bhutan’s Department of Mineral and Geology and Japanese research partners under SATREPS. The published inventory — open definition was constructed from imagery acquired between 2006 and 2011, using geometric processing and interpretation to delineate lakes and glaciers.

An inventory is a dataset assembled with explicit rules. This one applies a minimum lake area of 0.01 square kilometers and geographical criteria related to glaciers and moraines. That threshold is ten thousand square meters, equivalent in area to a square one hundred meters on each side. A smaller lake missing from this inventory is not thereby proven absent from the landscape. Its omission may follow from the dataset’s selection rule.

Read an inventory’s inclusion rule

The accompanying Terra/ASTER scene was acquired on 20 November 2001. It shows mountain terrain, glaciers and lakes, but it is a separate observation from the ALOS images used for the cited inventory. It is also much older than INS-2B and ICSP. Comparing the shapes of lakes and debris-covered ice is useful practice; relabeling this scene as a product of Bhutan’s newer satellites would misrepresent its origin.

A glacier or lake inventory describes mapped features for particular observations and methods. It does not by itself predict when a dam will fail. Assessing change requires comparable dates, careful alignment and uncertainty estimates; assessing hazard requires further physical and exposure information. A practical strategy links these layers to people who can maintain and evaluate them. Success is a trusted, usable information chain, not simply a longer list of satellites or a map with more colored outlines.