<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 07:20:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% 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, 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" >
2026.03.08 (067) 07:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606703080720009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.866" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.765" 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="5.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="426.756" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="347.228" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="276.210" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="1.866" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.345" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.252" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.818" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="52">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 270.000 271.250 272.500 273.750 275.000 275.000 275.000 270.000 275.000 280.000 285.000 282.500 280.000 285.000 290.000 290.000 290.000 291.667 293.333 295.000 303.333 311.667 320.000 320.000 320.000 320.000 325.000 330.000 330.000 337.500 360.000 370.000 380.000 390.000 396.250 402.500 403.552 404.779 406.225 407.957 410.069 412.701 416.071 420.541 426.756 435.984 451.116 480.487 562.040
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 66 66 0 0 0 72 69 69 0 72 60 57 0 66 0 57 54 60 0 0 60 0 69 72 63 72 60 60 63 60 0 63 60 57 54 0 0 0 57 0 0 57 0 0 57 0 51 0 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 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 1.953125 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 1.953125 -1.171875 0.390625 0.390625 1.171875 -2.734375 0.390625 1.953125 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 -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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.6 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.2 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.8 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.228 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.343 0.329 0.308 0.279 0.239 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.236 0.259 0.282 0.304 0.327 0.35 0.354 0.438 0.532 0.633 0.751 0.895 1.079 1.328 1.678 2.143 2.651 3.109 3.494 3.818 4.094 4.331 4.536 4.714 4.869 5.004 5.119 5.218 5.301 5.368 5.421 5.46 5.486 5.499 5.5 5.499 5.489 5.471 5.446 5.412 5.373 5.327 5.275 5.218 5.156 5.091 5.021 4.948 4.873 4.794 4.714 4.632 4.548 4.463 4.377 4.291 4.204 4.116 4.029 3.942 3.855 3.769 3.683 3.598 3.514 3.431 3.349 3.268 3.188 3.109 3.031 2.955 2.88 2.807 2.735 2.664 2.595 2.527 2.46 2.395 2.332 2.27 2.209 2.15 2.092 2.035 1.98 1.926 1.873 1.822 1.772 1.723 1.675 1.629 1.584 1.54 1.497 1.456 1.415 1.375 1.337 1.3 1.263 1.228 1.193 1.16 1.127 1.095 1.064 1.034 1.005 0.977 0.949 0.922 0.896 0.871 0.846 0.822 0.799 0.776 0.754 0.732 0.712 0.691 0.672 0.653 0.634 0.616 0.598 0.581 0.565 0.549 0.533 0.518 0.503 0.489 0.475 0.461 0.448 0.435 0.423 0.411 0.399 0.388 0.377 0.366 0.355 0.345 0.335 0.326 0.316 0.307 0.299 0.29 0.282 0.274 0.266 0.258 0.251 0.244 0.237 0.23 0.223 0.217 0.211 0.205

</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="5.5" PeakHeight="347.228" Num="5" zHalfNm="276.21" Error="6.175">
-165.846 45.806 -22.462 5.702 0.372
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.8" Depth="0.154"/>
<TopsideChapman PeakHeight="347.228" PeakDensity="375310.2" PeakScaleHeight="53.818" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
