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The Barrios ISS Analysis Tool is an interactive dashboard that provides Barrios analysts:
- A high-level overview of all current analyses and predictions
- The ability to upload updated datasets for adjusted analyses and predictions
- Detailed views of usage analysis, shipment optimizations, and resupply predictions
Fall 2023 Software Engineering
Barrios asked three questions at the beginning of this project. Those questions were:
- What is the percent difference between historical consumable usage rate assumptions and actual calculated usage rates in mission time frames between resupply?
Overall historical usage on the space station for the time period covered by client data was 1.04% less than assumed usage rates.
- What resupply quantities are necessary, considering planned resupply vehicle traffic from the ISS Flight Plan, planned On-Orbit Crew counts, and historical usage rates to sustain minimum supply thresholds, plus a 10% safety factor, through the next two years?
Usage quantities can be found in the table below.
| event_date | vehicle_name | ACY Inserts | Air | Filter Inserts | KTO | Nitrogen | Oxygen | Pretreat Tanks | Urine Receptacle | US Food BOBs | Water |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024-01-10 | Ax-3 | 63 | 282 lbs | 0 | 1 | 3 lbs | 52 lbs | 0 | 0 | 1 | 177 Liters |
| 2024-01-17 | DCC-1 | 172 | 484 lbs | 1 | 5 | 6 lbs | 177 lbs | 1 | 1 | 3 | 560 Liters |
| 2024-01-29 | NG-20 | 155 | 686 lbs | 1 | 4 | 8 lbs | 127 lbs | 0 | 1 | 4 | 431 Liters |
| 2024-02-15 | 87Progress | 27 | 121 lbs | 0 | 1 | 1 lbs | 23 lbs | 0 | 0 | 0 | 76 Liters |
| 2024-02-18 | Crew-8 | 136 | 605 lbs | 1 | 4 | 8 lbs | 112 lbs | 1 | 1 | 3 | 380 Liters |
| 2024-03-04 | SpX-30 | 346 | 1534 lbs | 2 | 9 | 18 lbs | 283 lbs | 1 | 2 | 7 | 962 Liters |
| 2024-04-11 | Boe-CFT | 182 | 807 lbs | 1 | 5 | 10 lbs | 150 lbs | 1 | 1 | 4 | 507 Liters |
| 2024-05-01 | HTV-X1 | 82 | 363 lbs | 0 | 2 | 4 lbs | 67 lbs | 0 | 0 | 2 | 228 Liters |
| 2024-05-10 | Ax-4 | 191 | 847 lbs | 1 | 6 | 10 lbs | 157 lbs | 1 | 1 | 4 | 532 Liters |
| 2024-05-31 | 88Progress | 273 | 1211 lbs | 2 | 7 | 15 lbs | 224 lbs | 1 | 2 | 5 | 760 Liters |
| 2024-06-30 | SpX-31 | 319 | 1412 lbs | 2 | 9 | 17 lbs | 261 lbs | 2 | 2 | 7 | 886 Liters |
| 2024-08-04 | USCV-9 | 136 | 605 lbs | 1 | 4 | 7 lbs | 112 lbs | 0 | 1 | 3 | 380 Liters |
| 2024-08-19 | 89Progress | 55 | 242 lbs | 0 | 1 | 3 lbs | 45 lbs | 1 | 0 | 1 | 152 Liters |
| 2024-08-25 | NG-21 | 191 | 848 lbs | 1 | 5 | 10 lbs | 157 lbs | 0 | 1 | 4 | 532 Liters |
| 2024-09-15 | DCC-2 | 611 | 1896 lbs | 4 | 17 | 23 lbs | 609 lbs | 3 | 4 | 13 | 1943 Liters |
| 2024-11-01 | PAM-5 | 291 | 1291 lbs | 1 | 8 | 16 lbs | 239 lbs | 1 | 1 | 6 | 811 Liters |
| 2024-12-03 | HTV-X2 | 36 | 162 lbs | 1 | 1 | 1 lbs | 30 lbs | 0 | 1 | 0 | 101 Liters |
| 2024-12-07 | 90Progress | 210 | 928 lbs | 1 | 6 | 12 lbs | 172 lbs | 1 | 1 | 5 | 583 Liters |
| 2024-12-30 | SPM | 9 | 40 lbs | 0 | 0 | 0 lbs | 7 lbs | 0 | 0 | 0 | 25 Liters |
| 2024-12-31 | SpX-32 | 291 | 1291 lbs | 2 | 8 | 16 lbs | 239 lbs | 2 | 2 | 6 | 811 Liters |
| 2025-02-01 | NG-22 | 45 | 202 lbs | 0 | 2 | 2 lbs | 37 lbs | 0 | 0 | 1 | 126 Liters |
| 2025-02-06 | USCV-10 | 164 | 726 lbs | 1 | 4 | 9 lbs | 135 lbs | 1 | 1 | 3 | 456 Liters |
| 2025-02-24 | 91Progress | 728 | 3228 lbs | 4 | 20 | 39 lbs | 597 lbs | 3 | 4 | 15 | 2027 Liters |
| 2025-05-15 | PAM-6 | 9 | 41 lbs | 0 | 0 | 0 lbs | 8 lbs | 0 | 0 | 1 | 25 Liters |
| 2025-05-16 | DCC-3 | 415 | 1170 lbs | 2 | 12 | 14 lbs | 428 lbs | 1 | 2 | 8 | 1354 Liters |
| 2025-06-14 | 92Progress | 437 | 1937 lbs | 3 | 12 | 23 lbs | 359 lbs | 2 | 3 | 9 | 1216 Liters |
| 2025-08-01 | NG-23 | 27 | 121 lbs | 0 | 0 | 2 lbs | 22 lbs | 0 | 0 | 1 | 76 Liters |
| 2025-08-04 | USCV-11 | 255 | 1130 lbs | 2 | 7 | 13 lbs | 209 lbs | 2 | 2 | 5 | 709 Liters |
| 2025-09-01 | 93Progress | 273 | 1210 lbs | 1 | 8 | 15 lbs | 224 lbs | 1 | 1 | 6 | 760 Liters |
| 2025-10-01 | CRS 2-24 | 282 | 1251 lbs | 2 | 8 | 15 lbs | 232 lbs | 1 | 2 | 6 | 785 Liters |
| 2025-11-01 | NG-24 | 228 | 1009 lbs | 1 | 6 | 12 lbs | 187 lbs | 1 | 1 | 4 | 634 Liters |
| 2025-11-26 | PAM-7 | 218 | 968 lbs | 1 | 6 | 12 lbs | 179 lbs | 1 | 1 | 5 | 607 Liters |
- What resupply quantities meet the requirements of question #2 while minimizing launch vehicle quantity? (e.g., launching 10,000 granola bars would ensure the minimum thresholds are not violated, but is not a realistic or optimal strategy for balancing launch mass requirements with supply requirements)
Resupply quantities listed in the table above meet the minimum launch vehicle quantity based on the schedule represented in the iss_flight_plan data.
Predictive modeling:
- What month in the next two years of the Flight Plan timeline is most likely to incur a violation of minimum supply thresholds?
The time period most likely to incur a violation of minimum resupply thresholds is the period between launches in February, 2025 and May 2025.
- Which consumables item(s) are most likely to incur a violation of minimum supply thresholds in the next two years of the future Flight Plan timeline?
Water is the most likely consumable to incur a violation of minimum resupply thresholds.
