February 2024 workshop: white-paper briefing, Lunar Logistics Drivers & Needs¶
Document: 12-2024-architecture-workshop-white-paper-lunar-logistics.pdf, 9 slides, 1,393,230 bytes, from
https://www.nasa.gov/wp-content/uploads/2024/02/, fetched 2026-10-01T18:28:04Z (sources/manifest.csv). Title
slide: "Lunar Logistics Drivers & Needs" (slide 1). No presenter or date. Footer: "2024 Moon to Mars Architecture
Workshops". Listed on the Architecture Workshops page under
"February 2024". Text: sources/text/docs/2024-02-12-2024-architecture-workshop-white-paper-lunar-logistics.txt;
images in sources/raw/slides/2024-02-12-2024-architecture-workshop-white-paper-lunar-logistics/.
Rank and method. A briefing, not the architecture of record (SCHEMA, "Workshop slides"), older than Rev B and Rev C. It briefs a 2023 white paper the wiki doesn't hold, "Lunar Logistics Drivers and Needs" (Overview and Updates, slide 11). All 9 slides were read in the text layer; the images of the text-poor slides 2, 5 and 9 were viewed, and of slides 4, 6 and 7 (a picture slide and two charts). The title card (slide 1) wasn't. The text has no "Moon Base", "CUI" or "Pre-Decisional" (searched).
Summary. What "logistics items" are, the six kinds NASA sorts them into, the four drivers of how much a lunar surface mission needs, and two charts: total logistics mass for 2 and 4 crew over 7 to 28 days, and a breakdown by mass for an open-loop mission with many EVAs. Water, gases and food dominate by mass (slide 8).
Slides¶
| Slide | Title (as printed) | Content |
|---|---|---|
| 1 | "Lunar Logistics Drivers & Needs" | Title card |
| 2 | "What are Logistics Items?" | "Items needed to sustain life, maintain systems, and allow for productive science and utilization activities": "Food, water, and air"; "Spares parts and other similar products" (image: a Gateway rendering) |
| 3 | "Composition of Logistics Items" | Six categories |
| 4 | "Estimating Logistics Needs" | "Established processes allow for proper assessment of logistics systems and consistent analysis of architecture concepts." "Note: The process for estimating logistics item needs for conceptual missions does not dictate requirements for future missions." (image: an LTV rendering) |
| 5 | "Lunar Logistics Drivers" | Four bars: "Mission Duration"; "Crew Size"; "ECLSS Architecture" ("Environmental Control and Life Support System"); "EVA Cadence" ("Extravehicular Activity") (image) |
| 6 | "Mission Duration and Crew Size" | Bar chart (image) |
| 7 | "ECLSS Architecture and EVA Cadence" | Pie chart (image) |
| 8 | "Summary & Key Takeaways" | Four takeaways |
| 9 | "White Paper" | The paper (image) |
What logistics items are (slides 2–3)¶
Slide 3's six categories, with NASA's definitions as printed:
| Category | Definition |
|---|---|
| Consumables | "Commodities that support the conduct of mission activities not related to a specific activity." |
| Utilization (Payloads and Research) | "Hardware and items (e.g., science, research, capability demonstration, outreach) that are integrtated but not required for crew or vehicle operations." |
| Maintenance Items | "Planned replacement hardware and tools for known limited lifetimes and scheduled replacements." |
| Outfitting | "Hardware or components that are flown after the initial module delivery for permanent installation or use." |
| Spares | "Items and tools for unplanned corrective maintenance." |
| Packaging, Overhead, and Carriers | "Materials required to safely and effectively transport and store logistics items." |
How much (slides 6–7)¶
Slide 6, "Mission Duration and Crew Size", read from the image: "Total Required Logistics (kg)", "Does not include pressurized carriers or tank mass", for "2 Crew" and "4 Crew" over "Surface Mission Duration" of 7, 14, 21 and 28 days. Each bar is solid to a level and then fades out over a band; no key explains the fade. Read off the chart, approximately (the wiki's reading): the solid part runs from about 500 kg (2 crew, 7 days) to about 2,000 kg (4 crew, 28 days), and the faded tops from about 700 kg to about 3,000 kg. Mass grows with both crew and days.
Slide 7, "ECLSS Architecture and EVA Cadence": "A representative breakdown by mass of logistics needs for a conceptual Open-loop ECLSS lunar surface mission with a significant planned cadence of EVAs." The pie's slices, matched to the legend by color and order (the wiki's reading of the image):
| Item | Share |
|---|---|
| Water | 29% |
| EVA | 21% |
| Food | 14% |
| Oxygen | 9% |
| Consumables | 8% |
| Spares | 7% |
| Nitrogen | 7% |
| Utilization | 5% |
The paper's own Figure 2, as far as slide 9's thumbnail can be read, labels the same slices with the same shares, and calls the 21% slice "EVA Consumables & Spares". By the wiki's sum, water, oxygen and nitrogen make 45%, and with food 59%.
Takeaways (slide 8)¶
- "The architecture must be based on comprehensive, accurate estimates of logistics item needs and include assessments of suitable logistics sub-architectures to deliver those needs."
- "Logistics items are everything not initially delivered as part of a vehicle or element dry mass needed to support missions."
- "Crew size, mission duration, ECLSS sub-architecture capabilities, and planned EVA cadence are the primary drivers for the total logistics needs."
- "Water, gases, and food dominate overall logistics needs by mass."
The paper (slide 9)¶
Thumbnails of the paper's three pages and a QR code, read from the image as far as the print allows. The first page is headed "Lunar Logistics Drivers and Needs", with "2023 Moon to Mars Architecture" down the side and "2023 Moon to Mars Architecture Concept Review" in the footer. Legible headings: "Introduction", "Composition of Logistics Items", "Lunar Logistics Drivers", "Logistics Item Estimates", "Summary". Legible captions: "Figure 1. Approximate Logistics Item Needs for Representative Lunar Surface Missions" (slide 6's chart) and "Figure 2. Open-Loop Mass Breakdown Example" (slide 7's). No body text is quoted here from the thumbnails.
Where it bears on the architecture¶
The subject is the Logistics Systems sub-architecture's; the pairing is the wiki's. The title bears on open question 30: this is the 2023 paper "Lunar Logistics Drivers and Needs", which the February 2025 logistics briefing names by its own title (February 2025 briefing, slide 2). It is not the 2025 Update's "Lunar Logistics and Mobility", so it doesn't settle the question.
What changed by Rev C¶
The wiki's comparison: the slide 6 chart's crew of 2 and 4 and stays of 7 to 28 days fall within Rev C's legacy decisions, up to four crew and up to 33 days on the surface (Key definition tasks). Rev C prints no logistics masses of this kind.
Oddities¶
As printed: "integrtated" (slide 3); "Spares parts" (slide 2); "Drivers & Needs" on the title slide against "Drivers and Needs" on the opening deck's list and the paper's first page.
Related pages¶
Logistics Systems · Lunar logistics, mobility and cargo briefing, February 2025 · Overview and Updates, February 2024