<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 06:50:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2, 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" >
2026.02.26 (057) 06:50:00</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">
FF202605702260650009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.961" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.651" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="295.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="355.239" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="289.030" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.259" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.572" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.026" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.694" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="76.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="105">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 322.500 325.000 325.000 322.500 260.000 260.000 275.000 276.667 278.333 280.000 280.000 282.500 285.000 287.500 290.000 292.500 295.000 293.333 291.667 290.000 288.333 286.667 285.000 290.000 292.500 295.000 298.333 301.667 305.000 305.000 305.000 310.000 310.000 310.000 305.000 305.000 302.500 300.000 287.500 275.000 280.000 280.000 320.000 325.000 324.423 323.846 323.269 322.692 322.115 321.538 320.962 320.385 319.808 319.231 318.654 318.077 317.500 316.923 316.346 315.769 315.192 314.615 314.038 313.462 312.885 312.308 311.731 311.154 310.577 310.000 302.500 295.000 302.500 310.000 315.000 320.000 325.000 330.000 332.500 335.000 350.000 365.000 370.000 370.000 370.000 375.000 377.949 381.201 384.805 388.821 393.324 398.409 404.195 410.839 418.547 427.597 438.373 451.420 467.540 487.966 514.687 551.143
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 54 0 51 60 0 72 72 63 0 0 66 57 63 72 66 63 0 63 0 66 66 0 69 75 69 0 63 54 0 54 0 0 0 60 72 0 0 0 54 0 0 60 63 0 48 0 0 0 60 0 0 0 0 0 0 0 57 0 72 66 69 0 0 63 0 60 0 60 0 0 60 60 51 0 60 0 54 0 57 0 60 54 66 63 66 57 60 63 54 66 72 69 69 69 66 57 57 0 0 57 0 54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 0.390625 1.171875 1.171875 1.171875 -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 -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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 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 0.390625 1.171875 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 1.171875 0.390625 1.171875 -1.953125 0.390625 1.171875 0.390625 1.171875
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.747 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.493 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.24 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.239 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.331 0.312 0.285 0.248 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.224 0.247 0.269 0.291 0.313 0.335 0.354 0.362 0.43 0.524 0.649 0.804 0.987 1.201 1.453 1.755 2.125 2.586 3.153 3.799 4.442 5.014 5.496 5.899 6.237 6.521 6.761 6.964 7.135 7.277 7.394 7.487 7.559 7.609 7.639 7.65 7.65 7.644 7.623 7.591 7.546 7.49 7.425 7.35 7.267 7.177 7.08 6.977 6.869 6.756 6.64 6.52 6.398 6.274 6.148 6.02 5.892 5.763 5.634 5.506 5.378 5.25 5.123 4.998 4.874 4.751 4.63 4.511 4.393 4.278 4.164 4.053 3.944 3.836 3.731 3.628 3.528 3.43 3.333 3.24 3.148 3.058 2.971 2.886 2.803 2.722 2.643 2.567 2.492 2.419 2.349 2.28 2.213 2.148 2.084 2.023 1.963 1.905 1.848 1.793 1.74 1.688 1.638 1.589 1.541 1.495 1.451 1.407 1.365 1.324 1.284 1.246 1.208 1.172 1.137 1.102 1.069 1.037 1.006 0.975 0.946 0.917 0.89 0.863 0.837 0.811 0.787 0.763 0.74 0.718 0.696 0.675 0.654 0.635 0.615 0.597 0.579 0.561 0.544 0.528 0.512 0.496 0.481 0.467 0.452 0.439 0.425 0.412 0.4 0.388 0.376 0.365 0.354 0.343 0.332 0.322 0.313 0.303 0.294 0.285 0.276 0.268 0.26 0.252 0.244 0.237

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.65" PeakHeight="355.239" Num="5" zHalfNm="289.03" Error="4.897">
-165.971 42.928 -24.605 9.445 -2.796
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.24" Depth="0.154"/>
<TopsideChapman PeakHeight="355.239" PeakDensity="726085.6" PeakScaleHeight="50.694" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
