<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 08:30:00.000"
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: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.02.27 (058) 08:30:00</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">
FF202605802270830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.442" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.588" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="275.000" 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="0.483" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="296.803" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.416" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.368" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.288" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.758" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.377" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="45">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 247.500 245.000 242.500 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 246.000 247.000 248.000 249.000 250.000 251.000 252.000 253.000 254.000 255.000 256.000 257.000 258.000 259.000 260.000 262.500 265.000 270.000 275.000 275.000 275.000 330.000 355.000 347.500 340.000 356.000 372.000 388.000 404.000 420.000 435.000 447.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 0 75 0 72 78 63 0 72 72 72 72 0 72 0 0 0 57 72 72 0 0 66 72 63 0 66 0 0 63 66 0 0 57 51 51 57 0 48 0 0 51 51 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 -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 -1.171875 -1.953125 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.779 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.17 140.0 145.0 150.0 155.0 160.0 165.0 166.34 170.0 175.0 180.0 185.0 190.0 194.51 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 296.803 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.319 0.418 0.468 0.483 0.477 0.457 0.422 0.369 0.284 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.237 0.287 0.337 0.387 0.438 0.483 0.535 0.717 0.861 1.012 1.185 1.4 1.702 2.257 3.459 4.081 4.429 4.67 4.853 4.996 5.109 5.199 5.27 5.324 5.363 5.388 5.399 5.4 5.398 5.384 5.36 5.326 5.282 5.23 5.171 5.105 5.033 4.955 4.874 4.788 4.698 4.606 4.512 4.416 4.318 4.22 4.121 4.021 3.922 3.823 3.724 3.627 3.53 3.434 3.34 3.246 3.155 3.065 2.976 2.89 2.805 2.722 2.64 2.561 2.483 2.408 2.334 2.262 2.192 2.124 2.058 1.993 1.93 1.869 1.81 1.753 1.697 1.643 1.59 1.539 1.49 1.442 1.395 1.35 1.306 1.264 1.223 1.183 1.145 1.107 1.071 1.036 1.002 0.969 0.938 0.907 0.877 0.848 0.821 0.794 0.767 0.742 0.718 0.694 0.671 0.649 0.628 0.607 0.587 0.568 0.549 0.531 0.513 0.496 0.48 0.464 0.449 0.434 0.42 0.406 0.392 0.379 0.367 0.355 0.343 0.332 0.321 0.31 0.3 0.29 0.28 0.271 0.262 0.253 0.245 0.237 0.229 0.221 0.214 0.207 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.483" PeakHeight="110.0" Num="3" Error="0.0">
-22.013 4.16 -0.368
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.483" EndFrequency="5.4" PeakHeight="296.803" Num="5" zHalfNm="237.416" Error="4.657">
-131.895 47.846 -29.701 12.554 -1.097
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="84.51" Depth="0.283"/>
<TopsideChapman PeakHeight="296.803" PeakDensity="361786.6" PeakScaleHeight="46.377" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
