<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 09:20:00.000"
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 1 0 0 0 0 0 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: F2x 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) 09:20:00</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">
FF202606703080920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="6.775" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.712" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.294" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.233" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" 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="0.850" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="340.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="1.442" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="295.525" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="251.366" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.002" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.876" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="82.117" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="54.286" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.605" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.796" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.790" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.400" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 350.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 365.000 370.000 340.000 340.000 345.000 350.000 364.120 497.869
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 69 54 63 0 69 0 66 63 0 57 63 63 60 63 72 63 54 57 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 285.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 298.000 301.000 304.000 307.000 310.000 310.000 307.500 305.000 305.000 307.500 310.000 305.000 310.000 315.000 325.000 325.000 335.000 345.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 0 60 63 57 45 51 54 54 60 0 51 0 0 51 57 0 60 63 0 0 57 0 60 63 0 0 69
</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 1.171875 1.171875 0.390625 1.171875 0.390625 -1.953125 1.171875 -1.171875 0.390625 1.171875 0.390625 2.734375 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 0 0 0 0 75 75 75 0 0 78 75 63
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="181">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.962 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.698 125.0 130.0 133.395 135.0 140.0 145.0 145.093 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 251.366 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 295.525 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.203 0.964 1.249 1.396 1.442 1.416 1.334 1.293 1.293 1.293 1.293 1.313 1.377 1.441 1.442 1.617 1.815 2.023 2.235 2.447 2.656 2.861 3.063 3.263 3.46 3.657 3.854 4.052 4.252 4.455 4.663 4.877 5.097 5.323 5.545 5.702 5.712 5.813 6.057 6.237 6.504 6.706 6.743 6.762 6.772 6.775 6.775 6.77 6.754 6.726 6.689 6.642 6.587 6.523 6.453 6.376 6.293 6.206 6.113 6.017 5.917 5.814 5.709 5.602 5.493 5.383 5.273 5.161 5.05 4.938 4.827 4.716 4.606 4.496 4.388 4.281 4.175 4.07 3.967 3.866 3.766 3.668 3.572 3.477 3.385 3.294 3.205 3.118 3.033 2.95 2.868 2.789 2.711 2.635 2.562 2.489 2.419 2.351 2.284 2.219 2.156 2.094 2.034 1.975 1.919 1.863 1.809 1.757 1.706 1.656 1.608 1.561 1.516 1.472 1.429 1.387 1.346 1.307 1.269 1.231 1.195 1.16 1.126 1.093 1.061 1.029 0.999 0.97 0.941 0.913 0.886 0.86 0.835 0.81 0.786 0.763 0.74 0.718 0.697 0.676 0.656 0.637 0.618 0.6 0.582 0.565 0.548 0.532 0.516 0.501 0.486 0.471 0.457 0.444 0.431 0.418 0.406 0.393 0.382 0.37 0.359 0.349 0.338 0.328 0.319 0.309 0.3 0.291 0.282 0.274 0.266 0.258 0.25 0.243 0.236 0.229 0.222 0.215 0.209 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.442" PeakHeight="110.0" Num="3" Error="0.0">
-27.985 9.712 -1.765
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="1.442" EndFrequency="5.712" PeakHeight="251.366" Num="5" Error="0.0">
-86.732 -30.201 14.251 -3.95 0.359
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.712" EndFrequency="6.775" PeakHeight="295.525" Num="5" zHalfNm="228.002" Error="3.123">
-56.189 22.417 -15.026 7.309 -2.67
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.093" Depth="0.149"/>
<TopsideChapman PeakHeight="295.525" PeakDensity="569486.7" PeakScaleHeight="51.796" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
