<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 14:50:00.000"
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 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.01 (060) 14:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003011450009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.582" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.500" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.100" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.310" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.174" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.658" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.518" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="497.000" 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="3.401" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.365" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="337.845" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.219" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.114" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="130.353" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.000" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.925" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="117">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.55 10.6 10.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 227.500 235.000 240.000 245.000 250.000 255.000 260.000 265.000 270.000 275.000 280.000 285.000 290.000 295.000 297.500 300.000 305.000 305.000 305.000 307.500 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 356.667 358.333 360.000 360.000 360.000 361.667 363.333 365.000 365.000 375.000 375.000 380.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 485.000 488.000 491.000 494.000 497.000 500.000 505.000 510.000 512.500 515.000 520.000 529.728 540.299 551.829 564.453
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 48 48 51 0 51 51 51 0 0 51 51 54 51 0 51 51 51 48 0 51 54 51 54 51 51 0 54 57 57 54 51 54 0 57 57 0 51 60 0 57 54 45 0 57 60 57 57 60 51 57 60 54 0 0 54 60 63 0 0 63 57 51 63 48 57 63 60 48 57 60 57 60 60 51 60 54 63 60 51 60 60 63 57 63 60 57 60 57 57 57 54 57 54 48 54 51 51 51 45 51 45 0 45 0 0 45 42 42 0 45 48 51 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.953125 -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 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 -1.953125 -1.953125 0.390625 0.390625 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 0.390625 1.953125 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.1 3.15 3.2 3.25 3.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.174 101.848 102.592 103.425 104.371
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 48 0 51
</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
</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 95.658 97.164 98.671 100.0 100.177 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 337.845 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.286 3.31 3.19 3.19 3.296 3.31 3.456 3.599 3.737 3.875 4.012 4.15 4.29 4.432 4.576 4.724 4.873 5.026 5.182 5.34 5.501 5.664 5.828 5.995 6.163 6.332 6.501 6.671 6.842 7.012 7.183 7.353 7.523 7.693 7.863 8.032 8.201 8.37 8.538 8.707 8.875 9.044 9.212 9.38 9.547 9.714 9.879 10.042 10.199 10.346 10.477 10.58 10.64 10.65 10.649 10.64 10.622 10.595 10.56 10.517 10.467 10.409 10.345 10.275 10.199 10.118 10.031 9.94 9.845 9.746 9.643 9.537 9.428 9.316 9.203 9.087 8.969 8.849 8.728 8.607 8.484 8.36 8.236 8.112 7.987 7.862 7.738 7.613 7.489 7.366 7.243 7.121 6.999 6.879 6.759 6.64 6.523 6.406 6.291 6.177 6.064 5.952 5.842 5.733 5.626 5.52 5.416 5.313 5.211 5.111 5.012 4.915 4.82 4.726 4.633 4.542 4.452 4.364 4.278 4.193 4.109 4.027 3.946 3.867 3.789 3.712 3.637 3.563 3.491 3.42 3.35 3.282 3.215 3.149 3.084 3.021 2.959 2.898 2.838 2.779 2.722 2.666 2.61 2.556 2.503 2.451 2.4 2.35 2.301 2.253 2.206 2.16 2.115 2.071 2.028 1.985 1.944 1.903 1.863 1.824 1.786 1.748 1.712 1.676 1.641 1.606 1.572 1.539 1.507 1.475 1.444 1.414 1.384 1.355 1.326 1.298 1.271 1.244 1.218 1.192 1.167 1.142 1.118 1.095 1.072 1.049 1.027

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.31" PeakHeight="95.658" Num="3" Error="1.992">
-8.4 3.605 -0.863
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.31" EndFrequency="10.65" PeakHeight="337.845" Num="5" zHalfNm="235.219" Error="5.136">
-192.895 -61.203 20.835 -6.609 2.204
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.519" Depth="0.12"/>
<TopsideChapman PeakHeight="337.845" PeakDensity="1407227.0" PeakScaleHeight="72.925" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
