Balloon Borne GPS-Enabled Radiosondes That Enable Simultaneous Multi-Point Atmospheric Sensing With a Single Ground Station

Radiosondes are balloon borne atmospheric instruments that are a critical tool for understanding dynamics in the lower layers of the atmosphere. The low-cost radiosondes developed in the Space and Atmospheric Instrumentation Lab have been further developed to improve the system\u27s use as a science-quality atmospheric instrument that is unique in its ability to simultaneously track multiple sondes with a single ground station. Sensors to measure temperature and pressure were added to improve measurements of the atmospheric state. A printed circuit board shield and 3D-printed shell were designed to make mass manufacturing possible. A thermistor-based temperature sensor was developed and tested in a thermal chamber to verify its accuracy, precision, and repeatability between different payloads. The payloads have been launch tested in a variety of locations and during different atmospheric events such as thunderstorms and solar eclipses. This work presents system design details, as well as performance results from a variety of launches

Balloon Borne GPSsondes that Enable Simultaneous Multi-Point Atmospheric Sensing with a Single Ground Station

Balloon-borne radiosondes provide measurements of in-situ atmospheric data such as wind velocity, temperature, and pressure, amongst many others. The Space and Atmospheric Instrumentation Laboratory at Embry-Riddle Aeronautical University has developed low cost (\u3c $150, all inclusive) GPS-enabled radiosondes that are capable of having multiple balloons simultaneously in the air communicating to a single omni-directional ground station antenna. Each GPS-sonde is equipped with a GPS Module for zonal and meridional winds, thermistor for in-situ temperature, and a pressure sensor. Slant range of greater than 120km is achieved through low-cost LoRa radio modules. Interference-free transmission timing between multiple payloads is done by time division multiplexing. The current design allows for up to six payloads to be simultaneously airborne and transmit live atmospheric data through one ground station. A higher number of simultaneous transmissions are also possible, albeit with a minor hit to spatial resolution. We present the system design, complete with hardware and software details, as well data from our current test flights and plans for future development

Low Cost Magnetometer Calibration and Distributed Simultaneous Multipoint Ionospheric Measurements from a Sounding Rocket Platform

Low cost and low size-weight-and-power magnetometers can provide greater accessibility for distributed simultaneous measurements in the ionosphere, either onboard sounding rockets or on CubeSats. The Space and Atmospheric Instrumentation Laboratory at Embry-Riddle Aeronautical University launched a midlatitude sounding rocket named SpEED Demon from Wallops Flight Facility in August 2022. SpEED Demon has a comprehensive suite of instruments for electrodynamics and neutral dynamics measurements. Among this suite is one high performance Billingsley magnetometer (TFM65VQS) and six commercial-off-the-shelf magnetometers manufactured by the PNI Corporation (RM3100). Of the six, two PNI magnetometers are situated on a deployable boom on the main payload that also carries the Billingsley magnetometer. The remaining four PNI magnetometers are distributed among four ejectable subpayloads. These low-cost and low SWaP magnetometers can achieve a resolution of approximately 1.5 nT and a precision of +/- 4 nT (one sigma) at 15 Hz in a uniform magnetic field. This performance is sufficient for detecting and measuring field aligned currents as well as a variety of other geomagnetic disturbances. The magnetometers are calibrated against an independently calibrated flux-gate magnetometer inside a Helmholtz cage. Zero field offsets are quantified inside a triple-layer mu-metal zero gauss chamber. This work will present the calibration process, the calibration results, and the flight performance of these sensors from the SpEED Demon sounding rocket launch

Isolated housewives and complex maternal worlds: the significance of social contacts between women with young children in industrial societies.

This article reconsiders the picture of the mother of young children in industrialised societies as the 'isolated housewife', suggesting this notion is by no means straightforward. We suggest there is considerable evidence for the existence of mothers' social contacts and their significance both as 'work' and 'friendship' in industrial societies. A pre-occupation with the notion of the 'isolation' of 'housewives' has led social researchers to neglect sustained examination of the social relationships within which many/most mothers are involved on a day-to-day basis. Complexities of interpretation, for example what 'isolation' can actually mean, need to be drawn out from the existing literature. Evidence presented from two recent ethnographic studies shows patterned opportunities/constraints occurring in relation to mothers' social contacts within localised settings, whether through organised groups or other personal ties. The complex nature of individual women's social contacts is thus brought out. Some key questions are raised for the importance to sociology, anthropology and social policy of these apparently insignificant or invisible women's networks

Serum proteins reflecting inflammation, injury and repair as biomarkers of disease activity in ANCA-associated vasculitis

<p>Objective To identify circulating proteins that distinguish between active anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) and remission in a manner complementary to markers of systemic inflammation.</p><p>Methods Twenty-eight serum proteins representing diverse aspects of the biology of AAV were measured before and 6months after treatment in a large clinical trial of AAV. Subjects (n=186) enrolled in the Rituximab in ANCA-Associated Vasculitis (RAVE) trial were studied. Erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) levels were available for comparison. The primary outcome was the ability of markers to distinguish severe AAV (Birmingham Vasculitis Activity Score for Wegener's granulomatosis (BVAS/WG)3 at screening) from remission (BVAS/WG=0 at month 6), using areas under receiver operating characteristic (ROC) curve (AUC).</p><p>Results All subjects had severe active vasculitis (median BVAS/WG=8) at screening. In the 137 subjects in remission at month 6, 24 of the 28 markers showed significant declines. ROC analysis indicated that levels of CXCL13 (BCA-1), matrix metalloproteinase-3 (MMP-3) and tissue inhibitor of metalloproteinases-1 (TIMP-1) best discriminated active AAV from remission (AUC>0.8) and from healthy controls (AUC>0.9). Correlations among these markers and with ESR or CRP were low.</p><p>Conclusions Many markers are elevated in severe active AAV and decline with treatment, but CXCL13, MMP-3 and TIMP-1 distinguish active AAV from remission better than the other markers studied, including ESR and CRP. These proteins are particularly promising candidates for future studies to address unmet needs in the assessment of patients with AAV.</p>

Simulating growth dynamics in a South-East Asian rain forest threatened by recruitment shortage and tree harvesting

There is increasing evidence that the futurerecruitment in South-East Asian dipterocarp treesspecies depending on mast-fruiting events mightbe endangered by climate change or enhancedseed predation in forest fragments. Especially incombination with the ongoing tree harvesting inthis region the recruitment threat imposes asevere danger on the species richness andforest structure of the whole area. We here assesswith the process-based forest growth modelFormind2.0 the impacts of common tree loggingstrategies in those recruitment endangered forests.Formind2.0 is based on the calculations of thecarbon balance of individual trees belonging to13 different plant functional types. Even singlelogging events in those rain forests threatenedby a lack of recruitment led to shifts in theabundances of species, to species loss, and toforest decline and dieback. The results show thatcurrent logging practices in South-East Asiaseriously overuse the forests especially in thelight of changing climate conditions