<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 11:40:00.000"
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" >
2026.01.31 (031) 11:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603101311140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.698" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.010" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="380.000" 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="2.873" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="343.381" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="215.772" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.734" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="172.025" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.701" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.259" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="185.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.900" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 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 8.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 216.667 218.333 220.000 220.000 220.000 225.000 225.000 225.000 230.000 230.000 233.750 237.500 241.250 245.000 245.000 250.000 250.000 255.000 255.000 255.000 260.000 265.000 267.500 270.000 270.000 275.000 275.000 277.143 279.286 281.429 283.571 285.714 287.857 290.000 290.000 290.000 295.000 295.000 300.000 300.000 300.000 300.000 302.500 305.000 310.000 315.000 315.000 317.500 320.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 390.000 395.000 400.000 400.000 405.000 410.000 415.000 420.000 425.000 435.000 440.000 450.000 455.000 465.000 475.000 485.000 495.000 505.000 516.855 529.731 543.763 559.117 575.986 594.609 615.273 638.332 664.230
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 51 51 60 54 63 63 63 60 0 0 0 54 54 54 54 54 0 48 54 57 0 57 51 60 51 0 0 0 0 54 0 60 0 48 60 60 66 63 63 66 0 57 66 60 60 0 63 54 63 66 63 60 63 63 60 63 57 63 60 66 57 57 60 57 63 57 63 63 60 60 63 60 60 57 63 63 60 60 60 63 63 63 63 63 63 66 60 60 60 57 54 57 54 51 0 45 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 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 -2.734375 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 0.390625 0.390625 0.390625 -0.390625 1.171875
</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" >
89.568 90.0 95.0 100.0 105.0 110.0 113.794 115.0 117.588 120.0 121.382 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 343.381 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.931 2.487 2.78 2.873 2.751 2.751 2.751 2.829 2.873 2.991 3.148 3.305 3.464 3.628 3.798 3.975 4.16 4.35 4.546 4.745 4.946 5.146 5.344 5.539 5.729 5.913 6.093 6.267 6.435 6.599 6.757 6.91 7.058 7.202 7.342 7.477 7.608 7.734 7.856 7.974 8.086 8.194 8.297 8.394 8.484 8.568 8.644 8.711 8.77 8.819 8.856 8.883 8.897 8.9 8.9 8.896 8.887 8.873 8.856 8.833 8.807 8.777 8.743 8.706 8.665 8.621 8.574 8.524 8.471 8.416 8.358 8.298 8.236 8.171 8.105 8.037 7.968 7.897 7.824 7.75 7.676 7.6 7.523 7.445 7.367 7.288 7.208 7.128 7.048 6.967 6.886 6.804 6.723 6.641 6.56 6.479 6.397 6.316 6.235 6.155 6.074 5.994 5.914 5.835 5.756 5.678 5.6 5.523 5.446 5.37 5.294 5.219 5.145 5.071 4.998 4.926 4.855 4.784 4.713 4.644 4.575 4.507 4.44 4.374 4.308 4.243 4.179 4.115 4.053 3.991 3.93 3.869 3.81 3.751 3.693 3.636 3.579 3.523 3.468 3.414 3.36 3.307 3.255 3.204 3.153 3.104 3.054 3.006 2.958 2.911 2.864 2.819 2.774 2.729 2.685 2.642 2.6 2.558 2.517 2.476 2.436 2.397 2.358 2.32 2.282 2.245 2.209 2.173 2.138 2.103 2.069 2.035 2.002 1.969 1.937 1.906 1.874 1.844 1.814 1.784 1.755 1.726 1.698 1.67 1.642 1.616

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.873" PeakHeight="110.0" Num="3" Error="0.0">
-30.086 12.543 -2.889
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.873" EndFrequency="8.9" PeakHeight="343.381" Num="5" zHalfNm="215.772" Error="6.939">
-221.577 -4.323 7.561 -5.656 1.996
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.382" Depth="0.122"/>
<TopsideChapman PeakHeight="343.381" PeakDensity="982754.3" PeakScaleHeight="93.259" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
