<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-25 -056 21:50:00.000"
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="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: 100%</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" >
2026.02.25 (056) 21:50:00</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">
FF202605602252150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.283" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.177" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" 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="0.479" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="501.343" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="364.870" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.974" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="194.267" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.330" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="103.576" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="166.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 372.500 375.000 375.625 376.250 376.875 377.500 378.125 378.750 379.375 380.000 380.000 380.000 380.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 400.000 400.000 400.000 400.000 405.000 405.000 406.250 407.500 408.750 410.000 410.000 410.000 410.000 415.000 415.000 417.143 419.286 421.429 423.571 425.714 427.857 430.000 430.000 435.000 435.000 435.000 435.000 440.000 445.000 450.000 455.000 455.000 455.000 457.500 460.000 465.000 465.000 470.000 475.000 480.000 480.000 480.000 485.000 490.000 490.000 500.000 500.000 505.000 510.000 515.000 517.500 520.000 527.500 535.000 542.500 550.000 555.000 560.000 565.000 570.000 580.000 588.502 597.988 608.637 620.679 634.406 650.197 668.557 690.168 715.978 747.340 786.263 835.856 901.205
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 60 0 54 0 51 54 66 0 57 66 66 0 0 0 48 0 0 0 0 0 0 0 66 69 0 0 60 48 0 54 54 0 0 63 51 51 57 0 54 54 0 48 0 60 66 69 69 66 66 0 0 51 0 0 0 72 69 57 0 0 66 0 0 0 48 54 57 0 60 60 60 0 0 54 60 60 60 63 63 63 66 51 60 57 0 60 0 63 0 51 57 51 57 57 60 63 66 69 69 69 51 51 57 54 51 45 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 1.953125 0.390625 -1.171875 -1.953125 2.734375 2.734375 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.171875 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.812 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.217 140.0 145.0 150.0 155.0 160.0 165.0 166.433 170.0 175.0 180.0 185.0 190.0 194.65 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 501.343 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.317 0.415 0.464 0.479 0.473 0.453 0.419 0.366 0.283 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.235 0.285 0.334 0.384 0.433 0.479 0.482 0.52 0.562 0.608 0.659 0.714 0.775 0.841 0.913 0.992 1.078 1.172 1.275 1.387 1.509 1.643 1.789 1.949 2.123 2.312 2.517 2.736 2.97 3.217 3.474 3.738 4.005 4.272 4.536 4.794 5.044 5.285 5.515 5.736 5.945 6.144 6.332 6.509 6.677 6.835 6.984 7.123 7.254 7.377 7.492 7.599 7.698 7.79 7.875 7.953 8.025 8.089 8.148 8.2 8.246 8.286 8.319 8.347 8.369 8.385 8.395 8.4 8.4 8.399 8.394 8.386 8.374 8.359 8.341 8.319 8.295 8.267 8.237 8.204 8.169 8.131 8.09 8.048 8.003 7.957 7.908 7.858 7.806 7.752 7.697 7.641 7.583 7.524 7.463 7.402 7.34 7.277 7.213 7.148 7.082 7.016 6.949 6.882 6.815 6.747 6.678 6.61 6.541 6.472 6.403 6.334 6.264 6.195 6.126 6.057 5.988 5.919 5.85 5.782 5.714 5.646 5.578 5.511 5.444 5.377 5.311 5.245 5.179 5.114 5.05 4.986 4.922 4.859 4.796 4.734 4.672 4.611 4.551 4.491 4.431 4.372 4.314 4.256 4.199 4.143 4.087 4.031 3.976 3.922 3.868 3.815 3.763 3.711 3.659 3.609 3.558 3.509 3.46 3.411 3.364 3.316 3.27 3.224 3.178 3.133 3.089 3.045 3.001

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.479" PeakHeight="110.0" Num="3" Error="0.0">
-21.942 4.115 -0.361
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.479" EndFrequency="8.4" PeakHeight="501.343" Num="5" zHalfNm="364.87" Error="3.254">
-344.283 65.168 -35.317 9.418 -1.679
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="84.65" Depth="0.279"/>
<TopsideChapman PeakHeight="501.343" PeakDensity="875434.25" PeakScaleHeight="103.576" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
