<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 13:50:00.000"
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 33 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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) 13:50:00</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">
FF202606003011350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.671" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.577" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.100" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.260" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.039" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.360" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.229" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.338" 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="4.336" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="319.868" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.209" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.609" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.846" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.606" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.882" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="170.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<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 9.8 9.85 9.9 9.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 290.000 290.000 290.000 290.000 295.000 297.500 300.000 300.000 300.000 300.000 305.000 307.500 310.000 311.667 313.333 315.000 316.667 318.333 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 363.333 366.667 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 445.000 445.000 450.000 450.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 484.453 489.580 495.550 502.587 511.006 521.258 534.014
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 51 0 54 48 0 0 0 0 57 54 57 0 0 0 0 0 51 0 57 54 51 54 51 48 0 51 51 57 57 57 57 60 60 60 60 60 60 63 54 57 57 60 63 0 0 54 60 66 60 66 63 63 63 60 48 57 63 57 60 54 60 54 63 60 54 63 60 54 60 57 60 63 60 57 60 60 60 57 54 57 60 54 57 54 54 54 54 45 48 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 -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 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 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.1 3.15 3.2 3.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.039 101.367 103.037 105.323
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 95.36 97.125 98.89 100.0 100.655 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 319.868 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.252 3.26 3.14 3.14 3.215 3.26 3.435 3.608 3.767 3.918 4.065 4.21 4.355 4.499 4.644 4.789 4.936 5.084 5.233 5.384 5.536 5.69 5.845 6.002 6.16 6.318 6.478 6.639 6.801 6.964 7.127 7.291 7.456 7.621 7.788 7.954 8.122 8.289 8.458 8.626 8.794 8.962 9.128 9.292 9.451 9.601 9.737 9.849 9.924 9.95 9.95 9.945 9.93 9.907 9.874 9.834 9.786 9.731 9.669 9.6 9.526 9.447 9.362 9.273 9.179 9.082 8.98 8.876 8.769 8.659 8.547 8.433 8.317 8.2 8.082 7.962 7.842 7.721 7.6 7.478 7.357 7.235 7.114 6.993 6.873 6.753 6.634 6.516 6.398 6.282 6.166 6.052 5.939 5.827 5.717 5.607 5.499 5.393 5.288 5.184 5.082 4.981 4.882 4.784 4.688 4.593 4.5 4.408 4.318 4.23 4.143 4.057 3.973 3.89 3.809 3.73 3.652 3.575 3.5 3.426 3.354 3.283 3.213 3.145 3.078 3.012 2.948 2.885 2.823 2.762 2.703 2.645 2.588 2.532 2.477 2.424 2.371 2.32 2.27 2.22 2.172 2.125 2.079 2.034 1.989 1.946 1.903 1.862 1.821 1.782 1.743 1.704 1.667 1.631 1.595 1.56 1.526 1.492 1.46 1.428 1.396 1.366 1.336 1.306 1.278 1.25 1.222 1.195 1.169 1.143 1.118 1.093 1.069 1.046 1.023 1.0 0.978 0.957 0.936 0.915 0.895 0.875 0.856 0.837 0.818 0.8 0.783

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.26" PeakHeight="95.36" Num="3" Error="1.075">
-7.95 3.401 -0.811
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.26" EndFrequency="9.95" PeakHeight="319.868" Num="5" zHalfNm="222.209" Error="3.967">
-180.045 -56.476 19.059 -3.284 1.533
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.295" Depth="0.12"/>
<TopsideChapman PeakHeight="319.868" PeakDensity="1228318.9" PeakScaleHeight="69.882" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
