DescentOptions

cacheSizereadonly

The streamer's heightfield cache size. Default: the streamer's own cap.

cellPixelsreadonly

Pixels a grid cell may subtend before refining. Default 16.

fromHeightreadonly

Height above the ground at the top of the descent. Default: the arm's ceiling.

latitudereadonly

Degrees, what ir.sites() prints. Radians is a bare number, so a radian field here would read a latitude copied out of that listing as radians and describe ground 2,578° away; the brand refuses the copy.

lensreadonly

The lens the descent is flown behind. Default: the flight lens.

Every figure a descent reports is a function of it — measured over the zoo, two to three times the patches between the two ends of the field-of-view slider — so a baseline that did not say which lens it was taken through is a number nobody can reproduce. The report carries it back out for exactly that reason.

longitudereadonly

maxLevelreadonly

Deepest level to refine to. Default is the body's own surfaceDetailFloor — the level past which a patch is an upsample of its parent.

maxPatchesreadonly

The patch cap, for asking what a selection wants rather than what it gets.

The streamer's own default is a safety net that degrades the whole disk by a level when it bites, and the only way to find out how hard it is biting is to raise it and re-fly. That is how the telephoto end of the slider got a number instead of an adjective.

sitereadonly

A SurveySite id. Ignored when latitude/longitude are given.

stepsreadonly

How many samples the profile is cut into. Default 128.

toHeightreadonly

Height at the bottom. Default: 2 m, where a person stands.

trackDegreesreadonly

Degrees of ground track flown off before touching down.

A purely vertical drop is the one descent that understates the streamer: the sub-camera point never moves, so the window slides only when the level changes and the level-churn figure comes out flattering. Ten degrees is a shallow approach — 1,100 km on an Earth-sized body — and it makes the window traverse ground the way an arrival actually does.

viewportreadonly

Display pixels, supersampling already divided out. Default: 1920×1080.