te imagery shows a complete detachment of Airlock 1. Is that correct? What’s your status? Include your personal health and Hab equipment.
[08:39]WATNEY: If by “detachment” you mean “shot me out like a cannon” then yeah. Minor cut on my forehead. Had some issues with my EVA suit (I’ll explain later). I patched up the Hab and repressurized it (main air tanks were intact). I just got power back online. Primary air and water tanks were unharmed. The rover, solar array, and Pathfinder were out of blast range. I’ll run diagnostics on the Hab’s systems while I wait for your next reply. By the way, who am I talking to?
[08:52]JPL: Venkat Kapoor, in Houston. Pasadena relays my messages. I'm going to handle all direct communication with you from now on. Check the Oxygenator and Water Reclaimer first. They’re the most important.
[09:05]WATNEY: Duh. Oxygenator functioning perfectly. Water Reclaimer is completely offline. Best guess is water froze up inside and burst some tubing. I’m sure I can fix it. Hab’s main computer also functioning without any problems. Any idea what caused the Hab to blow up?
[09:18]JPL: Best guess is fatigue on the canvas near Airlock 1. The pressurization cycle stressed it until it failed. From now on, alternate Airlock 2 and 3 for all EVAs. Also, we’ll be getting you a checklist and procedures for a full canvas exam.
[09:31]WATNEY: Yay, I get to stare at a wall for several hours! By the way, the farm is dead. I’ve recovered as many potatoes as I could and stored them outside. I count 1841. That will last me 184 days. Including the remaining mission rations, I’ll start starving on Sol 584.
[09:44]JPL: Yeah, we figured. Working on it.
“It’s Sol 122,” Bruce said. “We have until Sol 584 to get a probe to Mars. That’s 462 sols, which is 475 days.”
The assembled department heads of JPL furrowed their brows and rubbed their eyes.
“First they needed a presupply way ahead of schedule,” Bruce continued. “Now they need it even more ahead of schedule.”
He stood from his chair. “The positions of Earth and Mars aren’t ideal. The trip will take 414 days. Mounting the probe to the booster and dealing with inspections will take 13 days. That leaves us with just 48 days to make this probe.”
Sounds of whispered exasperation filled the room. “Jesus,” someone said.
“It's a whole new ballgame,” Bruce continued. “Our focus is food. Anything else is a luxury. We don't have time to make a powered-descent lander. It'll have to be a tumbler. So we can't put anything delicate inside. Say goodbye to the all the other crap we'd planned to send.”
“Where's the booster coming from?”asked Norm Toshi, who was in charge of the reentry process.
“The EagleEye 3 Saturn probe,” Bruce said. “It was scheduled to launch next month. NASA put it on hold so we can have the booster.”
“I bet the EagleEye team was pissed about that,” Norm said.
“I'm sure they were,” Bruce said. “But it's the only booster we have that's big enough. Which brings me to my next point: We only get one shot at this. If we fuck it up, Mark Watney dies.”
He looked around the room and let that sink in.
“We do have some things going for us,” he finally said. “We have some of the parts built for the Ares 4 presupply missions. We can steal from them, and that'll save us some time. Also, we're sending food, which is pretty robust. Even if there's a reentry problem and the probe impacts at high velocity, food is still food.
“And we don't need a precision landing. Watney can travel hundreds of kilometers if necessary. We just need to land close enough for him to reach it. This ends up being a standard tumble-land presupply. All we have to do is make it quickly. So let's get to it.”
[08:02]JPL: We've spun up a project to get you food. It's been in progress for a week or so. We can get it to you before you starve, but it'll be tight. It'll just be food and a radio. We can't send an Oxygenator, Water Reclaimer, or any of that other stuff without powered descent.
[08:16]WATNEY: No complaints here! You get me the food, I'll be a happy camper. I've got all Hab systems up and running again. The Water Reclaimer is working fine now that I replaced the burst hoses. As for water supply, I have 620L remaining. I started with 900L (300 to start with, 600 more from reducing hydrazine). So I lost almost 300L to sublimation. Still, with the Water Reclaimer operational again, it's plenty.
[08:31]JPL: Good, keep us posted on any mechanical or electronic problems. By the way, the name of the probe we're sending is “Iris”. Named after the Greek goddess who traveled the heavens with the speed of wind. She's also the goddess of rainbows.
[08:47]WATNEY: Gay probe coming to save me. Got it.
Rich Purnell sipped coffee in the silent building. Only his cubicle illuminated the otherwise dark room. Continuing with his computations, he ran a final test on the software he'd written. It passed.
With a relieved sigh, he sank back in his chair. Checking the clock on his computer, he shook his head. 3:42am.
Being an astrodynamicist, Rich rarely had to work late. His job was to find the exact orbits and course corrections needed for any given mission. Usually, it was one of the first parts of a project; all the other steps being based on the orbit.
But this time, things were reversed. Iris needed an orbital path, and nobody knew when it would launch. A non-Hoffman Mars-transfer isn't challenging, but it does require the exact locations of Earth and Mars.
Planets move as time goes by. A course calculated for a specific launch date will work only for that date. Even a single day's difference would result in missing Mars entirely.
So Rich had to calculate many courses. He had a range of 25 days during which Iris might launch. He calculated one course for each.
He began an email to his boss.
Mike, he typed, Attached are the courses for Iris, in 1-day increments. We should start peer-review and vetting so they can be officially accepted. And you were right, I was here almost all night.
It wasn't that bad. Nowhere near the pain of calculating orbits for Hermes. I know you get bored when I go in to the math, so I'll summarize: The small, constant thrust of Hermes's ion drives is much harder to deal with than the large point-thrusts of presupply probes.
All 25 of the courses take 414 days, and vary only slightly in thrust duration and angle. The fuel requirement is nearly identical for the orbits and is well within the capacity of EagleEye's booster.
It's too bad. Earth and Mars are really badly positioned. Heck, it's almost easier to-
He stopped typing.
Furrowing his brow, he stared in to the distance.
“Hmm.” he said.
Grabbing his coffee cup, he went to the break room for a refill.
“I know you're all busy,” Teddy said, “so let's make this fast. I need status on Project Iris from all departments. Venkat, let's start with you.”
“The mission team's ready,” Venkat said. “There was a minor turf war between the Ares-3 and Ares-4 presupply control teams. The Ares-3 guys said they should run it, cause while Watney's on Mars, Ares-3 is still in progress. The Ares-4 team points out it's their co-opted probe in the first place. I ended up going with Ares-3.”
“Did that upset Ares-4?” Teddy asked.
“Yeah, but they'll get over it. They have 13 presupply missions coming up. They won't have time to be pissy.”
“Mitch,” Teddy said to the flight controller, “What about the launch?”
“We've got a control room ready,” Mitch replied. “I'll oversee the launch, then hand cruise and landing over to Venkat's guys.”
“Media?” Teddy said, turning to Annie Montrose.
“I'm giving daily updates to the press,” she said. “Everyone knows Watney's fucked if this doesn't work. The public hasn't been this engaged in ship construction since Apollo 11. CNN's 'The Watney Report' has been the #1 show in its time-slot for the past two weeks.”
“The attention is good,” Teddy said. “It'll help get us emergency funding from Congress. Maurice, how's the booster?”
“It's all right for now,” said Maurice Stein, Director of Pad Operations. “But it's not ideal. EagleEye 3 was set to launch. Boosters aren't designed to stand upright and bear the stress of gravity for long periods. We're adding external supports that we'll remove before launch. It's easier than disassembly. Also the fuel is corrosive to the internal tanks, so we had to drain it. In the mean time, we're performing inspections on all systems every three days.”
“Good, good,” Teddy nodded. “Now for the big question: Bruce? How's Iris coming along?”
“We're behind,” Bruce said with a tired shake of his head.