<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 22:40:00.000"
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, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.02.02 (033) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603302022240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.616" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.276" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="466.307" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="438.807" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="378.542" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.615" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="90.465" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.668" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.847" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="99.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="80">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.7 7.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
405.000 410.000 415.000 410.000 400.000 407.500 415.000 422.500 430.000 430.000 430.000 430.000 430.000 430.000 430.000 430.000 430.000 430.000 435.000 438.333 441.667 445.000 455.000 455.000 455.000 460.000 465.000 465.000 467.500 470.000 473.000 476.000 479.000 482.000 485.000 485.000 485.000 480.000 465.000 485.000 495.000 482.500 470.000 485.000 481.667 478.333 475.000 471.667 468.333 465.000 440.000 441.667 443.333 445.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 454.943 460.355 466.307 472.882 480.184 488.341 497.512 507.899 519.762 533.438 549.377 568.193 590.741 618.254
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51 51 51 0 0 0 60 0 0 63 0 54 0 0 0 57 57 0 0 57 0 0 51 51 48 54 0 51 0 0 0 0 48 0 48 51 48 51 48 0 51 51 0 0 0 0 0 51 54 0 0 51 54 0 51 51 57 54 0 54 51 54 60 0 0 51 0 0 0 0 0 0 0 0 0 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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 -1.171875 -1.953125 -0.390625 -2.734375 -1.953125 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -2.734375 -1.953125 -1.171875 -1.171875 1.171875 -0.390625 0.390625 2.734375 -1.171875 -0.390625 0.390625 -2.734375 1.171875 1.171875 0.390625 1.171875 -1.171875 1.171875 0.390625 1.171875 0.390625 -2.734375 -1.171875 1.953125 -1.953125 2.734375 -1.171875 2.734375 -2.734375 0.390625 -2.734375 1.953125 1.171875 -0.390625 -2.734375 -2.734375
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.34 145.0 150.0 155.0 160.0 165.0 170.0 174.68 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.02 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 438.807 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.342 0.327 0.304 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.225 0.249 0.273 0.297 0.321 0.344 0.354 0.382 0.434 0.496 0.567 0.647 0.737 0.835 0.941 1.054 1.172 1.296 1.424 1.557 1.695 1.836 1.981 2.13 2.283 2.44 2.601 2.766 2.935 3.108 3.286 3.468 3.655 3.846 4.042 4.242 4.448 4.658 4.874 5.094 5.318 5.547 5.78 6.015 6.252 6.49 6.724 6.951 7.167 7.363 7.53 7.657 7.732 7.75 7.749 7.736 7.705 7.659 7.598 7.524 7.438 7.342 7.236 7.122 7.001 6.873 6.741 6.604 6.464 6.321 6.176 6.03 5.882 5.735 5.587 5.441 5.295 5.15 5.007 4.866 4.726 4.589 4.455 4.322 4.193 4.066 3.942 3.82 3.702 3.586 3.473 3.363 3.256 3.152 3.051 2.953 2.857 2.764 2.674 2.586 2.501 2.419 2.339 2.261 2.186 2.114 2.043 1.975 1.909 1.845 1.783 1.723 1.665 1.609 1.555 1.502 1.452 1.403 1.355 1.309 1.265 1.222 1.18 1.14 1.102 1.064 1.028 0.993 0.959 0.927 0.895 0.864 0.835 0.807 0.779 0.752 0.727 0.702 0.678 0.655 0.632 0.611 0.59 0.57 0.55 0.532 0.513 0.496 0.479 0.462 0.447 0.431 0.417 0.402 0.389 0.375 0.362 0.35 0.338 0.327 0.315 0.305 0.294 0.284 0.274 0.265 0.256

</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="7.75" PeakHeight="438.807" Num="5" zHalfNm="378.542" Error="5.372">
-210.129 -38.346 24.127 -8.087 0.648
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.02" Depth="0.154"/>
<TopsideChapman PeakHeight="438.807" PeakDensity="745192.3" PeakScaleHeight="44.847" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
