<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-10 -100 09:20:00.000"
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="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: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.04.10 (100) 09:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.20" 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">
FF202610004100920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="1.484" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.054" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="1155.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="1155.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="1155.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.584" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="710.435" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="437.841" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.654" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="359.428" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.772" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="189.263" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="440.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
1270.000 1275.000 1245.000 1230.000 1215.000 1200.000 1185.000 1170.000 1155.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 12 9 0 0 0 0 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.953125 0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625 -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" >
89.9 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.696 125.0 130.0 131.393 135.0 140.0 142.089 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 710.435 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.209 1.059 1.372 1.533 1.584 1.554 1.46 1.441 1.441 1.441 1.441 1.489 1.556 1.584 1.613 1.658 1.7 1.739 1.778 1.815 1.852 1.889 1.925 1.962 1.999 2.037 2.075 2.114 2.154 2.194 2.235 2.277 2.32 2.364 2.409 2.455 2.502 2.551 2.6 2.65 2.701 2.753 2.806 2.859 2.912 2.966 3.021 3.075 3.13 3.184 3.238 3.291 3.345 3.397 3.45 3.501 3.553 3.603 3.653 3.702 3.751 3.799 3.846 3.893 3.939 3.985 4.03 4.075 4.118 4.162 4.205 4.248 4.29 4.331 4.373 4.413 4.454 4.494 4.534 4.573 4.612 4.651 4.69 4.728 4.766 4.804 4.841 4.879 4.916 4.953 4.99 5.026 5.063 5.099 5.135 5.171 5.207 5.242 5.278 5.313 5.349 5.384 5.419 5.454 5.488 5.523 5.558 5.592 5.626 5.66 5.694 5.727 5.76 5.793 5.825 5.856 5.887 5.917 5.946 5.974 5.999 6.023 6.045 6.063 6.079 6.09 6.097 6.1 6.1 6.1 6.098 6.097 6.094 6.09 6.086 6.081 6.075 6.069 6.061 6.054 6.045 6.036 6.026 6.015 6.004 5.992 5.98 5.967 5.954 5.94 5.925 5.91 5.894 5.878 5.862 5.844 5.827 5.809 5.79 5.772 5.752 5.733 5.713 5.692 5.672 5.65 5.629 5.607 5.585 5.563 5.54 5.517 5.494 5.47 5.446 5.422 5.398 5.374 5.349 5.324 5.299 5.274 5.248 5.223 5.197 5.171 5.145

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.584" PeakHeight="110.0" Num="3" Error="0.0">
-28.312 10.125 -1.913
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.584" EndFrequency="6.1" PeakHeight="710.435" Num="5" zHalfNm="437.841" Error="27.537">
-510.388 -99.31 64.418 -35.901 12.835
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="32.089" Depth="0.143"/>
<TopsideChapman PeakHeight="710.435" PeakDensity="461662.53" PeakScaleHeight="189.263" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
