Strocera

Lunar lander touchdown testing.

Apollo-traceable simulant for landing gear and touchdown testing, where the soil has to carry a load it sees once.

STROCERA / / / Regolithia / / / Space
[ 01 ]The challenge

Touchdown is a single event with no second attempt. The landing gear meets the surface at descent velocity, the footpads penetrate, and the vehicle either settles inside its tip-over margin or it does not. What governs that outcome is the bearing behaviour of the soil under a short, high load, not how it responds to repeated traffic. Descent engine plume erosion changes the surface before the footpads reach it, so the bed a lander is qualified against has to represent disturbed regolith as well as undisturbed. Generic sand carries load differently from regolith at every one of those points.

Schematic, illustrativeRegolithia
[ 02 ]The Strocera approach

Strocera supplies Regolithia reproducing its Apollo reference soils, Highland (RGS-H1) to Apollo 16 soil 64501 at phase match 96.4 % and Mare (RGS-M1) to Apollo 17 soil 72501 at phase match 99.2 %, both under one quality system. The particle size distribution and size fractions are published on each datasheet, so the test bed can be prepared to a stated condition and reproduced across drop-test campaigns. Alternative size fractions can be produced on request, and plume-disturbed surface conditions can be prepared from the same lot. Every lot ships with a characterization report referenced to its Apollo soil number, so landing loads measured in one campaign stay comparable to the next.

Full Regolithia spec
[ 03 ]Specifications for this use case
Property
Value
Method
Phase match, Highland (RGS-H1)
96.4 %
4 modelled phases; XRD and SEM-EDS
Phase match, Mare (RGS-M1)
99.2 %
4 modelled phases; XRD and SEM-EDS
Highland reference
Apollo 16 soil 64501 (RGS-H1)
Mare reference
Apollo 17 soil 72501 (RGS-M1)
Dv(10/50/90), Highland
2.93 / 8.84 / 74.0 µm
Laser diffraction, wet mode
Dv(10/50/90), Mare
3.29 / 10.4 / 74.1 µm
Laser diffraction, wet mode
Size cut
< 75 µm mesh
Sieve
Alternative size fractions
On request
[ 04 ]Validation status
Lab-validated

Phase match and bulk chemistry documented against the Apollo reference soil by XRD and SEM-EDS; configured per test campaign.

[ 05 ]Customer profile

Lander structures and GNC teams qualifying landing gear, footpad geometry, and tip-over margin against a defined touchdown condition.

[ 06 ]Adjacent use cases

Engineers working on this often also evaluate:

Bring your specification for Lunar lander touchdown testing.

Tell us the operating conditions. We'll formulate Regolithia to your application, and ship simulant matched to your particle specification and volume.