Human research studies are required to validate safe and acceptable prebreathe protocols for exploration mission scenarios. Prebreathe protocols will be developed using models and validated in ground trials using the EVA simulator described in DCS-2 and the Accept/Reject limits developed in that task.

Each proposed PB protocol must be validated for a specific environment due to expected differences in transit time to the destination, operational concepts, mission profile and exploration EVA activities.

Operational concepts still need to mature and studies are still needed to characterize human performance during exploration EVA tasks in order to design an EVA Simulator. Many different scenarios will need to be tested until enough data exist for a valid DCS prediction model. Some of these scenarios include:

1. Initial 8 hour EVA on location surface from Lander with crew not be completely saturated at exploration environment (currently proposed at 8 psi/32% O2 but is subject to change).
2. 8 hour construction/maintenance EVA with crew at exploration environment saturation.
3. Multiple short EVA excursions from SEV. Expected baseline is 4 x 45 min EVA, 6 days/week. If this scenario is tested during the PB validation, the intermittent recompression study may need to be adjusted.

In the past, PB protocols in flight have been able to build in additional safety margin based on operational constraints, but this will not be the case with the Exploration Program.  Therefore, ground based testing must be carried out with the utmost precision and care in relation to simulating the key parameters related to DCS risk.

Human research studies are required to validate safe and acceptable prebreathe protocols for exploration mission scenarios. Prebreathe protocols will be developed using models and validated in ground trials using the EVA simulator described in DCS-2 and the Accept/Reject limits developed in that task.

Each proposed PB protocol must be validated for a specific environment due to expected differences in transit time to the destination, operational concepts, mission profile and exploration EVA activities.

Operational concepts still need to mature and studies are still needed to characterize human performance during exploration EVA tasks in order to design an EVA Simulator. Many different scenarios will need to be tested until enough data exist for a valid DCS prediction model. Some of these scenarios include:

1. Initial 8 hour EVA on location surface from Lander with crew not be completely saturated at exploration environment (currently proposed at 8 psi/32% O2 but is subject to change).
2. 8 hour construction/maintenance EVA with crew at exploration environment saturation.
3. Multiple short EVA excursions from SEV. Expected baseline is 4 x 45 min EVA, 6 days/week. If this scenario is tested during the PB validation, the intermittent recompression study may need to be adjusted.

In the past, PB protocols in flight have been able to build in additional safety margin based on operational constraints, but this will not be the case with the Exploration Program.  Therefore, ground based testing must be carried out with the utmost precision and care in relation to simulating the key parameters related to DCS risk.

Human research studies are required to validate safe and acceptable prebreathe protocols for exploration mission scenarios. Prebreathe protocols will be developed using models and validated in ground trials using the EVA simulator described in DCS-2 and the Accept/Reject limits developed in that task.

Each proposed PB protocol must be validated for a specific environment due to expected differences in transit time to the destination, operational concepts, mission profile and exploration EVA activities.

Operational concepts still need to mature and studies are still needed to characterize human performance during exploration EVA tasks in order to design an EVA Simulator. Many different scenarios will need to be tested until enough data exist for a valid DCS prediction model. Some of these scenarios include:

1. Initial 8 hour EVA on location surface from Lander with crew not be completely saturated at exploration environment (currently proposed at 8 psi/32% O2 but is subject to change).
2. 8 hour construction/maintenance EVA with crew at exploration environment saturation.
3. Multiple short EVA excursions from SEV. Expected baseline is 4 x 45 min EVA, 6 days/week. If this scenario is tested during the PB validation, the intermittent recompression study may need to be adjusted.

In the past, PB protocols in flight have been able to build in additional safety margin based on operational constraints, but this will not be the case with the Exploration Program.  Therefore, ground based testing must be carried out with the utmost precision and care in relation to simulating the key parameters related to DCS risk.

Human research studies are required to validate safe and acceptable prebreathe protocols for exploration mission scenarios. Prebreathe protocols will be developed using models and validated in ground trials using the EVA simulator described in DCS-2 and the Accept/Reject limits developed in that task.

Each proposed PB protocol must be validated for a specific environment due to expected differences in transit time to the destination, operational concepts, mission profile and exploration EVA activities.

Operational concepts still need to mature and studies are still needed to characterize human performance during exploration EVA tasks in order to design an EVA Simulator. Many different scenarios will need to be tested until enough data exist for a valid DCS prediction model. Some of these scenarios include:

1. Initial 8 hour EVA on location surface from Lander with crew not be completely saturated at exploration environment (currently proposed at 8 psi/32% O2 but is subject to change).
2. 8 hour construction/maintenance EVA with crew at exploration environment saturation.
3. Multiple short EVA excursions from SEV. Expected baseline is 4 x 45 min EVA, 6 days/week. If this scenario is tested during the PB validation, the intermittent recompression study may need to be adjusted.

In the past, PB protocols in flight have been able to build in additional safety margin based on operational constraints, but this will not be the case with the Exploration Program.  Therefore, ground based testing must be carried out with the utmost precision and care in relation to simulating the key parameters related to DCS risk.

Human research studies are required to validate safe and acceptable prebreathe protocols for exploration mission scenarios. Prebreathe protocols will be developed using models and validated in ground trials using the EVA simulator described in DCS-2 and the Accept/Reject limits developed in that task.

Each proposed PB protocol must be validated for a specific environment due to expected differences in transit time to the destination, operational concepts, mission profile and exploration EVA activities.

Operational concepts still need to mature and studies are still needed to characterize human performance during exploration EVA tasks in order to design an EVA Simulator. Many different scenarios will need to be tested until enough data exist for a valid DCS prediction model. Some of these scenarios include:

1. Initial 8 hour EVA on location surface from Lander with crew not be completely saturated at exploration environment (currently proposed at 8 psi/32% O2 but is subject to change).
2. 8 hour construction/maintenance EVA with crew at exploration environment saturation.
3. Multiple short EVA excursions from SEV. Expected baseline is 4 x 45 min EVA, 6 days/week. If this scenario is tested during the PB validation, the intermittent recompression study may need to be adjusted.

In the past, PB protocols in flight have been able to build in additional safety margin based on operational constraints, but this will not be the case with the Exploration Program.  Therefore, ground based testing must be carried out with the utmost precision and care in relation to simulating the key parameters related to DCS risk.

Human research studies are required to validate safe and acceptable prebreathe protocols for exploration mission scenarios. Prebreathe protocols will be developed using models and validated in ground trials using the EVA simulator described in DCS-2 and the Accept/Reject limits developed in that task.

Each proposed PB protocol must be validated for a specific environment due to expected differences in transit time to the destination, operational concepts, mission profile and exploration EVA activities.

Operational concepts still need to mature and studies are still needed to characterize human performance during exploration EVA tasks in order to design an EVA Simulator. Many different scenarios will need to be tested until enough data exist for a valid DCS prediction model. Some of these scenarios include:

1. Initial 8 hour EVA on location surface from Lander with crew not be completely saturated at exploration environment (currently proposed at 8 psi/32% O2 but is subject to change).
2. 8 hour construction/maintenance EVA with crew at exploration environment saturation.
3. Multiple short EVA excursions from SEV. Expected baseline is 4 x 45 min EVA, 6 days/week. If this scenario is tested during the PB validation, the intermittent recompression study may need to be adjusted.

In the past, PB protocols in flight have been able to build in additional safety margin based on operational constraints, but this will not be the case with the Exploration Program.  Therefore, ground based testing must be carried out with the utmost precision and care in relation to simulating the key parameters related to DCS risk.