<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 13:20:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.02.06 (037) 13:20:00</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">
FF202603702061320009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="8.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.402" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.262" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.250" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.410" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.540" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="96.412" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="6.250" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.250" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.295" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="370.390" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="217.101" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.122" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="189.961" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.233" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="106.524" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="245.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.370" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="86">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 215.000 220.000 225.000 235.000 240.000 245.000 255.000 265.000 270.000 280.000 290.000 290.000 295.000 300.000 305.000 310.000 315.000 320.000 320.000 325.000 325.000 335.000 335.000 340.000 345.000 350.000 350.000 355.000 360.000 360.000 365.000 365.000 370.000 375.000 378.750 382.500 386.250 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 440.000 445.000 445.000 455.000 460.000 460.000 470.000 475.000 480.000 485.000 490.000 500.000 505.000 510.000 520.000 530.000 535.000 545.000 550.000 560.000 570.000 575.000 585.000 595.000 600.000 605.000 615.000 625.000 635.000 647.717 662.377 679.465 699.636
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 54 54 51 54 45 51 54 51 0 45 51 48 0 0 54 54 51 57 57 54 48 57 0 0 48 57 54 51 57 57 54 54 57 0 0 0 51 57 57 51 57 51 57 0 57 51 60 57 57 57 60 60 60 57 57 57 57 60 60 60 60 60 63 63 63 63 60 57 57 57 54 57 54 54 54 54 54 51 51 54 51 51 51 45
</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 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.25 3.3 3.35 3.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.540 103.206 105.486 109.243
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.953125 -2.734375 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" >
90.0 95.0 96.412 98.546 100.0 100.679 102.813 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.39 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.319 3.41 3.282 3.282 3.282 3.41 3.459 3.573 3.69 3.81 3.933 4.06 4.189 4.321 4.454 4.589 4.723 4.858 4.991 5.123 5.253 5.381 5.507 5.63 5.751 5.87 5.986 6.1 6.212 6.321 6.429 6.535 6.64 6.742 6.844 6.944 7.043 7.14 7.237 7.332 7.427 7.521 7.614 7.706 7.797 7.888 7.978 8.067 8.155 8.242 8.327 8.411 8.491 8.569 8.642 8.708 8.765 8.809 8.839 8.85 8.85 8.848 8.843 8.834 8.822 8.806 8.787 8.765 8.74 8.712 8.681 8.648 8.612 8.573 8.532 8.489 8.444 8.397 8.348 8.297 8.244 8.19 8.134 8.077 8.018 7.958 7.897 7.835 7.771 7.707 7.642 7.576 7.51 7.442 7.374 7.306 7.237 7.168 7.098 7.028 6.958 6.887 6.816 6.746 6.675 6.604 6.533 6.462 6.391 6.32 6.25 6.18 6.109 6.039 5.97 5.9 5.831 5.762 5.694 5.626 5.558 5.491 5.424 5.358 5.292 5.226 5.161 5.097 5.033 4.969 4.906 4.844 4.782 4.721 4.66 4.599 4.54 4.481 4.422 4.364 4.307 4.25 4.194 4.138 4.083 4.028 3.975 3.921 3.868 3.816 3.765 3.714 3.663 3.614 3.564 3.516 3.468 3.42 3.373 3.327 3.281 3.236 3.191 3.147 3.103 3.06 3.017 2.975 2.934 2.893 2.852 2.813 2.773 2.734 2.696 2.658 2.621 2.584 2.547 2.511 2.476 2.441 2.406 2.372 2.339 2.305 2.273

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.41" PeakHeight="96.412" Num="3" Error="0.745">
-9.535 4.116 -0.993
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.41" EndFrequency="8.85" PeakHeight="370.39" Num="5" zHalfNm="217.101" Error="7.385">
-236.929 -49.529 27.873 -10.844 1.852
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.401" Depth="0.128"/>
<TopsideChapman PeakHeight="370.39" PeakDensity="971743.2" PeakScaleHeight="106.524" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
