The P-POD Payload Planner's Guide

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P-POD Payload Planner’s Guide: Revision B – 5/15/00 2 of 19 1. INTRODUCTION The Space Development, Manufacturing & Integration (SDMI) Team is positioning Cal Poly, San Luis Obispo to be at the center of small satellite development. Working with Stanford’s Space Systems Development Laboratory (SSDL), the goal is to produce a standardized platform for small orbital experiments. Known as CubeSats, these tiny space vehicles are classified as PicoSatellites, meaning that the entire satellite weighs less then one kilogram. The 10-centimeter cubes are designed to house small experiments that otherwise would be cost-prohibitive to flight validate. Universities, alongside industrial and governmental interests, will be able to place their own CubeSats into orbit using our standardized deployment system. Cal Poly’s own satellite, PolySat, will be one of the first of these new CubeSats. The SDMI is leading the way in the development of this deployment system known as the P-POD (Poly Picosatellite Orbital Deployer). The two versions of the deployer will mount to various launch vehicles, including the Delta II and the Minotaur. The maiden voyage for P-POD1 and P-POD2, along with PolySat is tentatively scheduled for Late Summer 2001. The total number of CubeSats launched is yet unknown, but the manifest could reach upwards of fifteen CubeSats on the maiden voyage. Cal Poly will oversee CubeSat development worldwide, and shall orchestrate all launching services with the launch providers. The integration design team is responsible for overseeing all incoming CubeSats, and verifying that they meet the design requirements set forth in the P-POD Payload Planner’s Guide, which will be available to all interested parties. This ambitious interdisciplinary project, with students from all engineering majors and even several non-engineering majors, embodies the Cal Poly ‘Learn by Doing’ credo in every respect. The purpose of the Payload Planner’s Guide is to define clearly and carefully all CubeSat design requirements and all requirements for their interface with the deployer. This document is divided into the following sections: 1. Introduction 2. CubeSat Deployer Description 3. CubeSat Physical and Electrical Requirements 4. CubeSat Operational Requirements 5. Delivery Deadlines and Pricing Please refer to the SDMI website for more information regarding the project: http://www.calpoly.edu/~aero/polysat
P-POD Payload Planner’s Guide: Revision B – 5/15/00 3 of 19 2. PICOSATELLITE DEPLOYER DESCRIPTION This section of the document shall provide an overview of the CubeSat environment while onboard the deployer. The CubeSat provider shall be briefed on the following criteria required for integration into the deployer: 2.1 Deployer System Overview 2.2 CubeSat Containment and Deployer Interface 2.3 CubeSat Launch Environment 2.4 P-POD Orbital Environment Please refer to Section 3 for explicit CubeSat requirements. 2.1 Deployer System Overview The P-POD System has two distinct release platforms, each with a unique deployer that has different requirements on the CubeSats themselves. 2.1.1. Platform #1: P-POD1 With this configuration, the deployment system requires less design refinement for the CubeSats. The published specification tolerances for the CubeSat, as well as the outer mounting surface area provide for easier manufacturing of the CubeSats. The ultimate aim of this system is to provide deployment services to clients with limited manufacturing capabilities, such as universities and high schools, since the P-POD1 can accept a wider variation in CubeSat design. The mounting configuration for P-POD1 has three CubeSats per “POD,” with each CubeSat located by their corners via a series of mounting blocks. The three CubeSats sit next to one another on a base that slides vertically on roller slides, and two doors, which remain closed and locked until deployment, confine the entire base. Two Compression Springs provide the launching force, and the doors are opened via a cam system that ensures that the doors are fully opened when the base reaches its maximum height. Figure 2.1. P-POD1 Concept Model. (Left: Doors Open Right: Doors Closed) Note: As of the publishing date of this document, the P-POD1 is still under design review. Anticipated release of all design documentation is Winter 2000. No further mention of the P-POD1 design shall take place in this edition of the Payload Planner’s Guide.
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The P-POD Payload Planner's Guide

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