<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 22:30:00.000"
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, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.03.12 (071) 22:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607103122230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.387" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="13.844" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="545.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="545.000" 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="5.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="581.489" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="504.847" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="454.620" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.426" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.567" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.437" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.339" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="115.950" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="62">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
545.000 546.250 547.500 548.750 550.000 552.500 555.000 555.000 555.000 555.000 555.000 555.000 552.500 550.000 550.000 550.000 550.000 550.238 550.476 550.714 550.952 551.190 551.429 551.667 551.905 552.143 552.381 552.619 552.857 553.095 553.333 553.571 553.810 554.048 554.286 545.000 545.000 547.500 550.000 550.000 550.000 550.000 552.500 555.000 557.500 560.000 560.000 560.000 560.000 560.000 565.000 570.000 570.000 570.000 571.240 572.803 574.833 577.576 581.489 587.523 598.043 621.008
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 57 0 54 0 0 51 0 51 57 0 57 0 57 0 57 0 0 0 0 0 0 0 0 0 0 0 0 51 0 51 54 57 57 54 54 0 54 60 0 54 54 54 0 57 57 57 57 57 54 54 57 57 51 54 0 54 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -2.734375 -1.953125 -1.171875 1.171875 -1.171875 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.171875 1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -2.734375 2.734375 -1.953125 -1.953125 -1.171875 -0.390625 -1.953125 -1.171875 -0.390625 -1.953125 -2.734375 -0.390625 -0.390625 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 0.390625 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="180">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.37 145.0 150.0 155.0 160.0 165.0 170.0 174.739 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.109 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 504.847 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.225 0.249 0.273 0.296 0.32 0.344 0.354 0.368 0.397 0.433 0.477 0.53 0.592 0.66 0.729 0.798 0.867 0.935 1.001 1.067 1.132 1.196 1.26 1.325 1.389 1.453 1.518 1.583 1.648 1.715 1.781 1.849 1.918 1.987 2.058 2.129 2.202 2.276 2.352 2.429 2.508 2.588 2.67 2.755 2.841 2.929 3.02 3.114 3.21 3.309 3.411 3.517 3.627 3.741 3.859 3.982 4.111 4.246 4.389 4.539 4.698 4.869 5.052 5.25 5.464 5.68 5.8 5.8 5.79 5.761 5.715 5.654 5.58 5.494 5.398 5.294 5.182 5.064 4.941 4.815 4.686 4.555 4.423 4.29 4.158 4.026 3.895 3.766 3.639 3.514 3.392 3.272 3.155 3.04 2.929 2.821 2.716 2.613 2.515 2.419 2.326 2.236 2.15 2.066 1.985 1.907 1.832 1.76 1.69 1.623 1.558 1.496 1.436 1.379 1.323 1.27 1.219 1.17 1.122 1.077 1.033 0.991 0.951 0.913 0.876 0.84 0.806 0.773 0.742 0.711 0.682 0.654 0.628 0.602 0.578 0.554 0.531 0.51 0.489 0.469 0.45 0.431 0.414 0.397 0.38 0.365 0.35 0.336 0.322 0.309 0.296 0.284 0.272 0.261 0.25 0.24 0.23 0.221 0.212 0.203

</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="5.8" PeakHeight="504.847" Num="5" zHalfNm="454.62" Error="7.931">
-230.057 -111.447 59.045 -12.463 -2.816
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.109" Depth="0.154"/>
<TopsideChapman PeakHeight="504.847" PeakDensity="417369.72" PeakScaleHeight="37.339" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
