<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 13:00:00.000"
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" >
2026.02.07 (038) 13:00:00</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">
FF202603802071300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.435" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.739" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" 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="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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.198" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.270" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="371.247" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.943" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.082" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="167.361" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.201" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.031" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="206.960" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 210.000 213.000 216.000 219.000 222.000 225.000 230.833 236.667 242.500 248.333 254.167 260.000 265.000 267.500 270.000 275.000 278.571 282.143 285.714 289.286 292.857 296.429 300.000 303.333 306.667 310.000 313.333 316.667 320.000 323.333 326.667 330.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 348.333 351.667 355.000 355.000 360.000 360.000 361.667 363.333 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 440.000 445.000 450.000 450.000 460.000 465.000 470.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 530.000 535.000 535.000 545.000 545.000 550.000 560.000 565.000 575.000 585.000 600.000 620.000 651.000 701.101
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 0 0 0 0 48 0 0 0 0 0 48 48 0 48 45 0 0 0 0 48 0 48 0 45 0 45 0 0 45 0 54 51 54 48 54 54 54 45 0 0 45 54 45 48 0 0 45 45 48 54 60 54 60 51 54 60 63 66 63 66 63 57 63 60 51 60 57 60 57 54 60 60 60 57 57 57 54 48 45 45 48 51 51 54 54 57 60 60 57 54 57 57 57 54 60 60 60 60 60 63 63 60 57 54 48 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 1.953125 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 1.171875 1.171875 0.390625 -1.171875 -0.390625 2.734375 -1.171875 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 1.171875 -2.734375 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 -1.171875 1.953125 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" >
89.513 90.0 95.0 100.0 105.0 110.0 112.354 114.708 115.0 117.062 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.247 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.151 2.768 3.094 3.198 3.076 3.076 3.091 3.198 3.271 3.402 3.541 3.688 3.839 3.995 4.153 4.312 4.472 4.63 4.788 4.944 5.098 5.25 5.401 5.551 5.699 5.845 5.99 6.134 6.277 6.419 6.56 6.701 6.84 6.979 7.118 7.255 7.393 7.529 7.666 7.801 7.937 8.071 8.205 8.337 8.469 8.599 8.727 8.852 8.975 9.093 9.207 9.315 9.415 9.505 9.585 9.651 9.702 9.735 9.749 9.75 9.748 9.742 9.73 9.713 9.691 9.665 9.634 9.599 9.56 9.518 9.471 9.421 9.368 9.312 9.252 9.19 9.126 9.058 8.989 8.917 8.844 8.768 8.691 8.612 8.532 8.451 8.368 8.284 8.199 8.114 8.027 7.94 7.852 7.764 7.675 7.586 7.497 7.408 7.318 7.229 7.139 7.05 6.961 6.872 6.783 6.695 6.607 6.519 6.432 6.345 6.259 6.173 6.088 6.003 5.919 5.836 5.753 5.672 5.59 5.51 5.43 5.351 5.273 5.196 5.119 5.043 4.968 4.894 4.821 4.748 4.676 4.606 4.536 4.467 4.398 4.331 4.264 4.198 4.133 4.069 4.006 3.944 3.882 3.821 3.762 3.702 3.644 3.587 3.53 3.474 3.419 3.365 3.311 3.258 3.206 3.155 3.105 3.055 3.006 2.958 2.91 2.863 2.817 2.772 2.727 2.683 2.639 2.596 2.554 2.513 2.472 2.432 2.392 2.353 2.315 2.277 2.24 2.203 2.167 2.132 2.097 2.063 2.029 1.996 1.963 1.931

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.198" PeakHeight="110.0" Num="3" Error="0.0">
-30.356 12.938 -3.069
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.198" EndFrequency="9.75" PeakHeight="371.247" Num="5" zHalfNm="241.943" Error="4.523">
-229.001 -38.803 18.516 -4.74 -0.157
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.062" Depth="0.122"/>
<TopsideChapman PeakHeight="371.247" PeakDensity="1179435.5" PeakScaleHeight="93.031" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
