LOG ENTRY: SOL 71 (Jan. 17, 2036)

As predicted, it took 12 hours to charge the batteries to full. I came straight home. 

Time to make plans for Sirius 4. And I think it’ll be a multi-day field trip. 

Looks like power and battery recharging is solved. Food’s not a problem; there’s plenty of space to store things. Water’s even easier than food. I need 2L per day to be comfortable. 

In the long term, I’ll need to bring the Oxygenator. But it’s big and I don’t want to screw with it right now. So I’ll rely on O2 and CO2 filters for Sirius 4. 

CO2 isn’t a problem. I started this grand adventure with 1500 hours of CO2 filters, plus another 720 for emergency use. All systems use standard filters (Apollo 13 taught us important lessons). Since then, I’ve used 131 hours of filter on various EVAs. I have 2089 left. 87 days worth. Plenty. 

The rover was designed to support 3 people for 2 days, plus some reserve for safety. So its O2 tanks can hold enough to last me 7 days. Not enough. 

Mars has 1/90^th Earth’s atmospheric pressure. The inside of the rover has 1 atmosphere. So the oxygen tanks are on the inside (less pressure differential to deal with). Why does that matter? It means I can bring along other oxygen tanks, and equalize them with the rover’s tanks without having to do an EVA. 

So today, I detached one of the Hab’s two 25L oxygen tanks and brought it in to the rover. According to NASA, a human needs 588L of oxygen per day to live. Compressed liquid O2 is about 1000 times as dense as gaseous O2 in a comfortable atmosphere. Long story short: with the Hab tank, I have enough O2 to last 42 days. That’ll be plenty. Sirius 4 will be a 20 day trip. 

That may seem a bit long, but I have a specific goal in mind. Besides, my trip to Ares 4 will be at least 40 days. This is a good scale model. While I’m away, the Hab can take care of itself, but the potatoes are an issue. I’ll saturate the ground with most of the water I have. Then, I’ll deactivate the Atmospheric Regulator, so it doesn’t pull water out of the air. It’ll be humid as hell, and water will condense on every surface. That’ll keep the potatoes well watered while I’m away. 

A bigger problem is CO2. The potatoes need to breathe. I know what you’re thinking. “Mark, old chap! YOU produce carbon dioxide! It’s all part of the majestic circle of nature!” 

The problem is: Where will I put it? Sure, I exhale CO2 with every breath, but I don’t have any way to store it. I could turn off the Oxygenator and Atmospheric Regulator and just fill the Hab with my breath over time. But CO2 is deadly to me. I need to release a bunch at once and run away. 

Remember the MAV fuel plant? It collects CO2 from the Martian atmosphere. My small crops aren’t nearly as needy as me, so a 10L tank of compressed liquid CO2, vented in to the Hab, will be enough CO2 to do the trick. That’ll take less than a day to create. 

So that’s everything. Once I vent the CO2 in to the Hab, I’ll turn off the Atmospheric Regulator and Oxygenator, dump a ton of water on the crops, and head out. 

Sirius 4. A huge step forward in my rover research. And I can start tomorrow.

Chapter 8 

Jan. 17, 2036 (Sol 71)

“Hello, and thank you for joining us,” Cathy said to the camera. “Today on CNN’s Mark Watney Report: Several EVAs over the past few days… what do they mean? What progress has NASA made on a rescue option? And how will this affect the Ares 4 preparations? 

“Joining us today is Dr. Venkat Kapoor, Director of Mars Missions for NASA. Dr. Kapoor, thank you for coming.” 

“A pleasure to be here, Cathy,” Venkat said. 

“Dr. Kapoor,” Cathy began,“Mark Watney is the most-watched man in the solar system, wouldn’t you say?” 

Venkat nodded. “Certainly the most watched by NASA. We have all 12 of our Martian satellites taking pictures whenever his site’s in view. The European Space Agency has both of theirs doing the same.”

“All told, how often do you get these images?” 

“Every few minutes. Sometimes there’s a gap, based on the satellite orbits. But it’s enough that we can track all his EVA activities.”

“Tell us about these latest EVAs.” 

“Well,” Venkat began, “It looks like he’s preparing Rover 2 for a long trip. On Sol 65, he took the battery from the other rover and attached it with a homemade sling. The next day, he detached 14 solar cells and stacked them on the rover’s roof.” 

“And then he took a little drive, didn’t he?” Cathy prompted.

“Yes he did. Sort of aimlessly for an hour, then back to the Hab. He was probably testing it. Next time we saw him was two days later, when he drove 4km away, then back. Another incremental test, we think. Then, over the past couple of days, he’s been stocking it up with supplies.”

“Hmm,” Cathy said, “Most analysts think Mark’s only hope of rescue is to get to the Ares 4 site. Do you think he’s come to the same conclusion?” 

“Probably,” Venkat said. “He doesn’t know we’re watching. From his point of view, Ares 4 is his only hope.” 

“Do you think he’s planning to go soon? He seems to be getting ready for a trip.” 

“I hope not,” Venkat said. “There’s nothing at the site other than the MAV. None of the other presupplies. It would be a very long, very dangerous trip, and he’d be leaving the safety of the Hab behind.”

“Why would he risk it?” 

“Communication,” Venkat said. “Once he reaches the MAV, he could contact us.” 

“So that would be a good thing, wouldn’t it?” 

“Communication would be a great thing. But traversing 3,200km to Ares 4 is incredibly dangerous. We’d rather he stayed put. If we could talk to him, we’d certainly tell him that.” 

“He can’t stay put forever, right?” she asked. “Eventually he’ll need to get to the MAV.” 

“Not necessarily,” Venkat said. “JPL is experimenting with modifications to the MDV so it can make a brief overland flight after landing.” 

“I’d heard that idea was rejected as being too dangerous,” Cathy said.

“Their first proposal was, yes. Since then, they’ve been working on safer ways to do it.” 

“With only three and a half years before Ares 4’s scheduled launch, is there enough time to make and test modifications to the MDV?”

“I can’t answer that for sure. But remember, we made a lunar lander from scratch in seven years.” 

“Excellent point,” Cathy smiled. “So what are his odds right now?”

“No idea,” Venkat said. “But we’re going to do everything we can to bring him home alive.” 

Jan. 17, 2036 (Sol 71)

“How’d I do today?” Venkat asked. 

“Eeeh,” Annie said. “You shouldn’t say things like ‘Bring him home alive.’ It reminds people he might die.” 

“Think they’re going to forget that?” 

“You asked my opinion. Don’t like it? Go fuck yourself.”

“You’re such a delicate flower, Annie. How’d you end up NASA’s Communications Director?”

“Beats the fuck out of me,” Annie said. 

“Guys,” said Bruce Ng, Director of JPL. “I need to catch a flight back to LA in three hours. Is Teddy coming or what?” 

“Quit bitching, Bruce,” Annie said. “None of us want to be here.”

“So,” said Hermes Flight Director Mitch Henderson “Who are you, again?” 

“Um,” Mindy said, “I’m Mindy Park. I work in SatCon.”

“You a director or something?” 

“No, I just work in SatCon. I’m a nobody.” 

Venkat looked to Mitch “I put her in charge of tracking Watney. She gets us the imagery.” 

“Huh,” said Mitch. “Not the Director of SatCon?” 

“Bob’s got more to deal with than just Mars. Mindy’s handling all the Martian satellites, and keeps them pointed at Mark.” 

“Why Mindy?” Mitch asked. 

“She noticed he was alive in the first place.” 

“She gets a promotion cause she was in the hot seat when the imagery came through?” 

“No,” Venkat frowned, “She gets a promotion cause she figured out he was alive. Stop being a dick, Mitch. You’re making her feel bad.”

Mitch looked over to Mindy. “Sorry.” 

Mindy looked at the table and managed to say “’k.” 

Teddy entered the room. “Sorry I’m late. Let’s get started,” He took his seat. “Venkat, what’s Watney’s status?” 

“Alive and well,” Venkat said. “No change from my email earlier today.” 

“What about the RTG. Does the public know about that yet?” Teddy asked. 

Annie leaned forward. “So far, so good,” she said. “The images are public, but we have no obligation to tell them our analysis. Nobody has figured it out yet.” 

“Why did he dig it up?” 

“Heat, I think,” Venkat said. “He wants to make the rover do long trips. It uses a lot of energy keeping warm. The RTG can heat up the interior without soaking battery power. It’s a good idea, really.”

“How dangerous is it?” Teddy asked. 

“As long as the container’s intact, no danger at all. Even if it cracks open he’ll be ok if the pellets inside don’t break. But if the pellets break too, he’s a dead man.” 

“Let’s hope that doesn’t happen,” Teddy said. “JPL, how are the MDV plans coming along?” 

“We came up with a plan a long time ago,” Bruce said. “You rejected it.” 

“Bruce,” Teddy cautioned. 

Bruce sighed. “The MDV wasn’t made for liftoff and lateral flight. Packing more fuel in doesn’t help. We’d need a bigger engine and don’t have time to invent one. So we need to lighten the MDV. 

“We have an idea. The MDV can be its normal weight on primary descent. If we made the heat shield and outer hull detachable, they could ditch a lot of weight after landing at Ares 3, and have a lighter ship for the traverse to Ares 4. We’re running the numbers now.” 

“Keep me posted,” Teddy said. He turned to Mindy. “Miss Park. Welcome to the big leagues.” 

“Sir,” Mindy said. 

“What’s the biggest gap in coverage we have on Watney right now?”

“Um,” Mindy said. “Once every 41 hours, we’ll have a 17 minute gap. The orbits work out that way.” 

“You had an immediate answer,” Teddy said. “Good.” 

“Thank you, sir.” 

“I want that gap down to four minutes,” Teddy said. “I’m giving you total authority over satellite trajectories and orbital adjustments. Make it happen.” 

“Yes, sir,” Mindy said, with no idea how to do it. 

Teddy looked to Mitch. “Mitch, your email said you had something urgent?” 

“Yeah,” Mitch said. “How long are we gonna’ keep this from the Ares 3 crew? They all think Watney’s dead. It’s a huge drain on morale.” Teddy looked to Venkat.

“Mitch,” Venkat said. “We discussed this-“ 

“No, you discussed it,” Mitch interrupted. “They think they lost a crewmate. They’re devastated.” 

“And when they find out they abandoned a crewmate?” Venkat asked, “Will they feel better then?” 

Mitch poked the table with his finger “They deserve to know. You don’t think Commander Lewis can’t handle the truth?” 

“It’s a matter of morale,” Venkat said. “They can concentrate on getting home-“ 

“I make that call,” Mitch said. “I’m the one who decides what’s best for the crew. And I say we bring them up to speed.” 

After a few moments of silence, all eyes turned to Teddy. He thought for a moment. “Sorry, Mitch, I’m with Venkat on this one,” he said. “But as soon as we come up with a plan for rescue, we can tell Hermes. There needs to be some hope or there’s no point in telling them.” 

“Bullshit,” Mitch grumbled, crossing his arms. “Total bullshit,”

“I know you’re upset,” Teddy said calmly, “We’ll make it right. Just as soon as we have some idea how to save Watney.” 

Teddy let a few seconds of calm pass before moving on. “Ok, JPL’s on the rescue option,” he said with a nod toward Bruce. “But it would be part of Ares 4. How does he stay alive till then? Venkat?” 

Venkat opened a folder and glanced at the paperwork inside. “I had every team check and double-check the longevity of their systems. We’re pretty sure the Hab can keep working for 4 years. Especially with a human occupant fixing problems as they arise. But there’s no way around the food issue. He’ll start starving in a year. We have to send him supplies. Simple as that.” 

“What about an Ares 4 presupply?” Said Teddy. “Land it at Ares 3 instead.” 

“That’s what we’re thinking, yeah,” Venkat confirmed. “Problem is, the original plan was to launch presupplies a year from now. They’re not ready yet.

“It takes 8 months to get a probe to Mars in the best of times. The positions of Earth and Mars right now… it’s not the best of times. We figure we can get there in 9 months. Presuming he’s rationing his food, he’s got enough to last 350 more days. That means we need to build a presupply in three months. JPL hasn’t even started yet.” 

“That’ll be tight,” Bruce said. “Making a presupply is a 6 month process. We’re set up to pipeline a bunch of them at once, not to make one in a hurry.” 

“Sorry, Bruce,” Teddy said. “I know we’re asking a lot, but you have to find a way.” 

“We’ll find a way,” Bruce said. “But the OT alone will be a nightmare.” 

“Get started. I’ll find you the money.” 

“There’s also the booster,” Venkat said. “The only way to get a probe to Mars with the planets in their current positions is to spend a butt-load of fuel. We only have one booster capable of doing that. The Delta IX that’s on the pad right now for the EagleEye 3 Saturn probe. We’ll have to steal that. I talked to ULA, and they just can’t make another booster in time.” 

“The EagleEye 3 team will be pissed, but ok,” said Teddy. “We can delay their mission if JPL gets the payload done in time.”

Bruce rubbed his eyes. “We’ll do our best.” 

“He’ll starve to death if you don’t,” Teddy said.