✦ LIBER ✦

Obtaining single path phase delays from GPS double differences

✍ Scribed by Alber, Chris; Ware, Randolph; Rocken, Christian; Braun, John

Book ID: 119654855
Publisher: American Geophysical Union
Year: 2000
Tongue: English
Weight: 522 KB
Volume: 27
Category: Article
ISSN: 1944-8007
DOI: 10.1029/2000gl011525

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Ionospheric and tropospheric path delay

Ionospheric and tropospheric path delay obtained from GPS integrated phase, incoherent scatter and refractometer data and from IRI-86

✍ A.J. Coster; M. Buonsanto; E.M. Gaposchkin; D. Tetenbaum; L.E. Thornton 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 318 KB

Determination of GPS orbits using double

Determination of GPS orbits using double difference carrier phase observations from regional networks

✍ G. Beutler; W. Gurtner; M. Rothacher; T. Schildknecht; I. Bauersima 📂 Article 📅 1986 🏛 Springer-Verlag 🌐 English ⚖ 686 KB

Quality assessment of COSMIC/FORMOSAT-3

Quality assessment of COSMIC/FORMOSAT-3 GPS radio occultation data derived from single- and double-difference atmospheric excess phase processing

✍ William Schreiner; Chris Rocken; Sergey Sokolovskiy; Doug Hunt 📂 Article 📅 2009 🏛 Springer-Verlag 🌐 English ⚖ 438 KB

Saliva and serum samples were collected

Saliva and serum samples were collected from eight healthy volunteers every two hours during a 26-hour period. Melatonin concentrations were measured by radioimmunoassay after chloroform extraction using radioiodinated melatonin as a tracer. Five of the subjects had high serum melatonin levels at night (peak levels higher than 75 pg/ml); in three subjects the highest serum melatonin concentration was 20-40 pg/ml. All subjects had low levels (P <0.001, was obtained for all detectable value pairs (n= 73). The regression and correlation coefficients were almost equal for the peak values of melatonin and during the rising and descending phases of the secretion patterns. However, no significant correlation was found between low daytime salivary and serum concentrations when calculated separately. In the five high-secretors the melatonin levels in saliva reflected reliably the changes in serum, but in the three low-secretors the correlation between salivary and serum melatonin was not significant. The proportion of melatonin found in saliva decreased with increasing serum melatonin levels. Circadian rhythm parameters were estimated by single cosinor analysis. The acrophases did not differ significantly within a subject in the concomitant measurements of serum and salivary melatonin. The measurements of salivary melatonin levels seem valid for studies on melatonin rhythms, but the melatonin concentrations measured in saliva do not always consistently reflect the absolute concentrations in blood.

✍ Maija-Liisa Laakso; Tarja Porkka-Heiskanen; Aino Alila; Dag Stenberg; Gunnar Joh 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 622 KB