<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 15:40:00.000"
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: 90% PACIFIC flags: One of F2 cusps was derived from the other</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) 15:40:00</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">
FF202604102101540009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.339" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.802" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="565.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.377" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.354" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="383.914" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="258.795" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.653" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.925" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.491" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.882" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="217.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 335.000 340.000 345.000 350.000 353.333 356.667 360.000 365.000 365.000 370.000 370.000 372.500 375.000 377.500 380.000 382.500 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 401.667 403.333 405.000 410.000 415.000 410.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 555.000 560.000 565.000 565.000 575.000 580.000 585.000 585.000 590.000 595.000 600.000 606.358 613.689 622.232 632.318 644.404
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 45 45 0 0 45 45 48 45 48 0 0 0 0 0 45 51 51 54 54 51 57 57 51 0 51 0 0 54 0 48 54 0 54 57 54 0 51 54 51 54 48 57 54 48 60 57 63 57 54 60 63 60 57 57 54 60 63 63 45 45 54 45 48 51 54 60 63 60 54 51 60 60 57 57 51 51 48 51 51 51 48 48 48 45 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 0.390625 -2.734375 -1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 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 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
</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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.604 113.208 114.812 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 383.914 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.272 2.922 3.267 3.377 3.254 3.254 3.377 3.384 3.541 3.676 3.801 3.921 4.037 4.151 4.264 4.377 4.491 4.605 4.72 4.836 4.953 5.071 5.19 5.31 5.431 5.553 5.676 5.8 5.924 6.049 6.174 6.299 6.424 6.549 6.674 6.799 6.924 7.049 7.173 7.298 7.422 7.545 7.669 7.792 7.916 8.039 8.162 8.285 8.408 8.532 8.655 8.779 8.902 9.025 9.147 9.268 9.386 9.498 9.599 9.682 9.736 9.75 9.75 9.745 9.735 9.719 9.698 9.671 9.64 9.603 9.563 9.517 9.468 9.415 9.358 9.298 9.234 9.167 9.098 9.026 8.951 8.874 8.795 8.714 8.631 8.546 8.46 8.373 8.284 8.194 8.103 8.012 7.919 7.826 7.733 7.639 7.544 7.45 7.355 7.261 7.166 7.071 6.977 6.882 6.789 6.695 6.602 6.509 6.417 6.325 6.234 6.143 6.053 5.964 5.875 5.788 5.701 5.614 5.529 5.444 5.361 5.278 5.196 5.115 5.035 4.955 4.877 4.8 4.723 4.648 4.573 4.499 4.427 4.355 4.284 4.214 4.145 4.077 4.01 3.944 3.879 3.815 3.752 3.689 3.628 3.567 3.507 3.449 3.391 3.334 3.278 3.222 3.168 3.114 3.061 3.009 2.958 2.908 2.858 2.81 2.762 2.714 2.668 2.622 2.577 2.533 2.489 2.447 2.404 2.363 2.322 2.282 2.243 2.204 2.166 2.128 2.092 2.055 2.02 1.985 1.95 1.916 1.883 1.85 1.818 1.787

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.377" PeakHeight="110.0" Num="3" Error="0.0">
-30.491 13.137 -3.161
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.377" EndFrequency="9.75" PeakHeight="383.914" Num="5" zHalfNm="258.795" Error="5.436">
-217.966 -74.259 27.361 -7.157 2.919
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.812" Depth="0.123"/>
<TopsideChapman PeakHeight="383.914" PeakDensity="1179435.5" PeakScaleHeight="87.882" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
