<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-08 -039 23:00:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2, Trace overlaps while constructing baseline</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.02.08 (039) 23:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202603902082300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.594" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.268" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="496.233" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="432.663" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="369.683" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.444" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.207" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.049" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.424" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="98.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="79">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
430.000 430.000 435.000 435.000 435.000 435.000 435.000 436.429 437.857 439.286 440.714 442.143 443.571 445.000 450.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 460.000 462.500 465.000 465.000 470.000 450.000 400.000 400.000 400.000 405.000 410.000 411.250 412.500 413.750 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 445.000 448.750 452.500 456.250 458.450 460.882 463.584 466.604 470.000 473.849 478.247 483.321 489.240 496.233 504.623 514.874 527.683 544.145 566.080 596.762 642.729
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 66 63 63 0 60 48 0 48 0 0 0 51 51 54 60 63 66 63 60 0 60 60 0 60 60 60 54 63 69 69 66 54 0 0 0 57 60 51 57 60 60 60 60 60 57 60 63 66 63 66 72 72 0 66 63 60 69 0 0 0 60 60 63 57 51 66 66 57 0 48 0 57 57 45 48 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -0.390625 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -0.390625 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.404 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.809 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.213 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 432.663 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.308 0.278 0.238 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.238 0.261 0.284 0.307 0.33 0.353 0.354 0.396 0.449 0.514 0.592 0.682 0.782 0.892 1.01 1.134 1.265 1.402 1.544 1.692 1.847 2.007 2.174 2.348 2.528 2.715 2.91 3.112 3.322 3.539 3.765 3.998 4.238 4.487 4.742 5.003 5.27 5.542 5.816 6.091 6.365 6.634 6.896 7.146 7.381 7.595 7.783 7.941 8.065 8.15 8.194 8.2 8.198 8.181 8.149 8.101 8.04 7.967 7.882 7.787 7.683 7.571 7.451 7.326 7.196 7.061 6.922 6.781 6.637 6.491 6.345 6.197 6.05 5.902 5.755 5.609 5.465 5.321 5.179 5.04 4.902 4.766 4.633 4.502 4.373 4.248 4.124 4.004 3.886 3.771 3.659 3.549 3.442 3.338 3.236 3.138 3.042 2.948 2.857 2.768 2.682 2.599 2.518 2.439 2.362 2.288 2.216 2.146 2.078 2.013 1.949 1.887 1.827 1.769 1.712 1.658 1.605 1.553 1.504 1.456 1.409 1.364 1.32 1.278 1.237 1.197 1.158 1.121 1.085 1.05 1.016 0.983 0.952 0.921 0.891 0.862 0.835 0.808 0.782 0.756 0.732 0.708 0.685 0.663 0.642 0.621 0.601 0.581 0.563 0.544 0.527 0.51 0.493 0.477 0.462 0.447 0.432 0.418 0.405 0.392 0.379 0.367 0.355 0.343 0.332 0.322

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.2" PeakHeight="432.663" Num="5" zHalfNm="369.683" Error="6.69">
-209.056 -21.798 12.273 -2.762 -1.107
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.213" Depth="0.154"/>
<TopsideChapman PeakHeight="432.663" PeakDensity="834243.2" PeakScaleHeight="47.424" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
