<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 04:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.02.10 (041) 04:00:00</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">
FF202604102100400009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.854" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.832" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="360.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="362.729" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.828" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.583" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="137.041" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.546" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.927" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="112">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 230.000 235.000 240.000 235.000 240.000 241.000 242.000 243.000 244.000 245.000 245.000 245.000 245.000 245.625 246.250 246.875 247.500 248.125 248.750 249.375 250.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 255.000 257.500 260.000 260.000 260.000 260.000 262.500 265.000 267.500 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 277.500 280.000 280.000 281.250 282.500 283.750 285.000 285.000 290.000 290.000 292.500 295.000 295.000 295.000 300.000 300.000 300.000 305.000 307.000 309.000 311.000 313.000 315.000 317.500 320.000 320.000 320.000 320.000 325.000 327.500 330.000 330.000 335.000 335.000 340.000 345.000 345.000 345.000 348.750 352.500 356.250 360.000 360.000 365.000 370.000 375.000 379.692 384.828 390.475 396.712 403.637 411.371 420.065 429.908 441.145 454.094 469.179 486.976 508.290 534.274 566.656 608.128 663.144
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 0 60 72 57 0 0 0 0 60 0 69 0 0 0 0 0 0 66 0 66 63 0 66 69 0 54 63 72 63 66 54 0 60 54 57 0 54 48 0 0 66 69 72 63 0 69 66 0 66 51 0 0 0 75 75 66 63 0 60 48 69 51 69 66 60 0 0 0 0 63 0 57 72 75 69 63 0 72 69 66 69 66 66 72 66 0 69 0 66 66 60 69 66 66 63 60 66 63 66 69 54 60 57 60 60 0 54 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -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 -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 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.0 140.0 145.0 150.0 155.0 160.0 165.0 166.0 170.0 175.0 180.0 185.0 190.0 194.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 362.729 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.35 0.338 0.318 0.286 0.239 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.25 0.277 0.305 0.332 0.354 0.362 0.405 0.461 0.534 0.638 0.797 1.092 1.775 2.697 3.383 3.915 4.355 4.734 5.066 5.363 5.63 5.873 6.093 6.293 6.476 6.642 6.793 6.931 7.054 7.165 7.263 7.35 7.425 7.489 7.542 7.585 7.616 7.638 7.648 7.65 7.649 7.643 7.63 7.61 7.585 7.554 7.517 7.476 7.43 7.379 7.325 7.266 7.204 7.139 7.07 6.999 6.925 6.849 6.77 6.69 6.608 6.525 6.44 6.355 6.268 6.18 6.092 6.003 5.914 5.825 5.735 5.646 5.556 5.467 5.378 5.289 5.201 5.113 5.026 4.939 4.853 4.768 4.683 4.6 4.517 4.435 4.354 4.274 4.195 4.117 4.04 3.964 3.889 3.815 3.742 3.67 3.599 3.529 3.461 3.393 3.327 3.261 3.197 3.134 3.071 3.01 2.95 2.891 2.833 2.776 2.72 2.665 2.611 2.559 2.507 2.456 2.405 2.356 2.308 2.261 2.214 2.169 2.124 2.081 2.038 1.996 1.954 1.914 1.874 1.835 1.797 1.76 1.723 1.688 1.652 1.618 1.584 1.551 1.519 1.487 1.456 1.426 1.396 1.366 1.338 1.31 1.282 1.255 1.229 1.203 1.178 1.153 1.129 1.105 1.082 1.059 1.037 1.015 0.994 0.973 0.952 0.932 0.912 0.893 0.874 0.856 0.838 0.82

</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="7.65" PeakHeight="362.729" Num="5" zHalfNm="265.828" Error="3.13">
-220.391 81.619 -32.036 2.422 -0.343
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="84.0" Depth="0.154"/>
<TopsideChapman PeakHeight="362.729" PeakDensity="726085.6" PeakScaleHeight="72.927" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
