<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 14:40:00.000"
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) 14:40:00</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">
FF202604102101440009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.399" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.188" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="560.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.376" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.353" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="377.777" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.780" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.415" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="150.493" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.354" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.797" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="207.220" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 316.429 317.857 319.286 320.714 322.143 323.571 325.000 330.000 330.000 330.000 330.000 335.000 335.000 337.500 340.000 345.000 346.667 348.333 350.000 351.667 353.333 355.000 357.500 360.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 440.000 440.000 445.000 450.000 450.000 455.000 460.000 465.000 470.000 470.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 501.667 503.333 505.000 505.000 508.750 512.500 516.250 520.000 520.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 540.000 545.000 550.000 555.000 555.000 560.000 560.000 570.000 575.000 575.000 580.485 586.946 594.667 604.059 615.728 630.618
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 0 48 0 0 0 0 51 51 54 0 48 51 51 0 51 48 0 0 48 0 0 51 0 48 54 48 57 54 60 54 60 57 45 54 48 54 54 0 57 60 63 60 63 60 60 63 63 63 57 54 60 63 63 63 60 60 60 60 60 57 54 60 60 54 60 57 60 0 0 57 45 0 0 0 51 54 51 51 54 57 51 51 51 51 51 51 45 51 51 51 48 48 42 45 45 45 42 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 1.171875 -0.390625 -1.953125 2.734375 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 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 1.171875 -1.171875 -0.390625 -1.171875 1.953125 -1.171875 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.486 90.0 95.0 100.0 105.0 110.0 111.61 113.219 114.829 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 377.777 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.271 2.922 3.266 3.376 3.253 3.253 3.376 3.382 3.551 3.7 3.841 3.978 4.113 4.247 4.382 4.517 4.654 4.792 4.931 5.073 5.215 5.359 5.504 5.65 5.796 5.942 6.089 6.235 6.38 6.525 6.669 6.812 6.954 7.096 7.236 7.375 7.514 7.651 7.788 7.924 8.059 8.194 8.328 8.462 8.596 8.73 8.863 8.997 9.131 9.266 9.401 9.536 9.672 9.808 9.944 10.078 10.208 10.328 10.429 10.49 10.5 10.499 10.493 10.479 10.459 10.432 10.399 10.361 10.317 10.268 10.213 10.155 10.091 10.024 9.953 9.878 9.799 9.718 9.633 9.546 9.456 9.364 9.27 9.174 9.076 8.977 8.876 8.774 8.671 8.567 8.462 8.357 8.251 8.144 8.037 7.931 7.824 7.717 7.61 7.503 7.397 7.291 7.185 7.08 6.975 6.871 6.768 6.665 6.563 6.462 6.362 6.262 6.164 6.066 5.97 5.874 5.779 5.686 5.593 5.502 5.411 5.322 5.234 5.146 5.06 4.975 4.892 4.809 4.727 4.647 4.568 4.489 4.412 4.336 4.261 4.188 4.115 4.043 3.973 3.903 3.835 3.768 3.702 3.636 3.572 3.509 3.447 3.386 3.326 3.267 3.208 3.151 3.095 3.04 2.985 2.932 2.879 2.827 2.777 2.727 2.677 2.629 2.582 2.535 2.489 2.444 2.4 2.356 2.314 2.272 2.23 2.19 2.15 2.111 2.073 2.035 1.998 1.961 1.926 1.89 1.856 1.822 1.789 1.756 1.724 1.692

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.376" PeakHeight="110.0" Num="3" Error="0.0">
-30.49 13.136 -3.16
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.376" EndFrequency="10.5" PeakHeight="377.777" Num="5" zHalfNm="256.78" Error="3.484">
-215.016 -72.876 32.114 -10.513 3.343
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.829" Depth="0.123"/>
<TopsideChapman PeakHeight="377.777" PeakDensity="1367866.0" PeakScaleHeight="83.797" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
