<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 23:00:00.000"
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, F2 cusps do not match, Unidentified traces above foF2</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" >
2026.02.06 (037) 23:00:00</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">
FF202603702062300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.556" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.964" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="10.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="454.058" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="408.319" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.444" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.651" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.496" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.470" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="150">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 410.000 410.000 410.000 415.000 415.714 416.429 417.143 417.857 418.571 419.286 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 421.667 423.333 425.000 430.000 431.667 433.333 435.000 440.000 445.000 450.000 455.000 455.000 456.667 458.333 460.000 460.000 460.000 460.000 460.000 460.000 465.000 465.000 465.000 465.000 465.000 467.500 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 473.333 476.667 480.000 480.000 480.000 477.500 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 477.500 480.000 485.000 485.000 486.818 488.636 490.455 492.273 494.091 495.909 497.727 499.545 501.364 503.182 505.000 506.667 508.333 510.000 510.000 510.000 512.500 515.000 517.500 520.000 522.500 525.000 530.000 530.000 535.000 535.000 542.060 608.934
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 69 63 66 66 60 66 60 66 63 54 60 63 57 0 0 0 0 0 0 72 69 63 66 63 60 0 0 0 0 66 57 57 57 0 66 63 63 66 63 66 66 69 0 0 66 72 0 60 72 57 0 63 72 72 0 0 66 66 66 0 0 63 63 0 0 63 63 0 66 66 66 57 0 60 0 63 60 63 63 63 66 0 66 66 0 0 63 0 63 63 75 75 75 69 66 75 72 0 66 69 72 72 72 69 69 72 69 0 66 63 66 66 66 66 69 75 57 63 60 63 48 0 51 51 60 0 0 0 0 54 54 51 0 48 57 57 0 60 54 57 0 45 51 51 45 48 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 -0.390625 -0.390625 -1.953125 -0.390625 1.171875 1.953125 1.953125 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 1.953125 1.953125 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 -1.171875 -1.171875 0.390625 0.390625 -1.171875 -0.390625 0.390625 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 1.953125 2.734375 -1.953125 -1.171875 -1.171875 1.953125 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -2.734375 -1.171875 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 1.953125 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -2.734375 1.953125 1.171875 -1.171875 0.390625 -2.734375 1.171875 0.390625 -1.953125 -1.953125 -0.390625 -1.953125 1.171875 1.171875 -1.953125 -0.390625 -1.953125 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="176">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.387 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.774 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.161 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 454.058 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0
</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 0.278 0.237 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.238 0.261 0.284 0.307 0.33 0.353 0.354 0.42 0.498 0.585 0.676 0.772 0.872 0.974 1.08 1.188 1.301 1.416 1.535 1.658 1.786 1.917 2.053 2.194 2.34 2.491 2.647 2.81 2.979 3.154 3.336 3.525 3.722 3.928 4.141 4.364 4.596 4.838 5.091 5.356 5.632 5.922 6.224 6.541 6.873 7.221 7.584 7.963 8.356 8.761 9.172 9.579 9.959 10.28 10.492 10.55 10.549 10.52 10.453 10.351 10.219 10.06 9.878 9.676 9.459 9.228 8.987 8.738 8.483 8.224 7.963 7.702 7.442 7.183 6.928 6.676 6.429 6.187 5.95 5.72 5.495 5.277 5.066 4.861 4.662 4.471 4.286 4.107 3.935 3.77 3.611 3.457 3.31 3.168 3.033 2.902 2.777 2.657 2.542 2.431 2.326 2.224 2.127 2.034 1.945 1.86 1.779 1.701 1.626 1.554 1.486 1.421 1.358 1.298 1.241 1.186 1.134 1.084 1.036 0.99 0.947 0.905 0.865 0.826 0.79 0.755 0.722 0.69 0.659 0.63 0.602 0.575 0.55 0.526 0.502 0.48 0.459 0.438 0.419 0.401 0.383 0.366 0.35 0.334 0.319 0.305 0.292 0.279 0.266 0.255 0.243 0.233 0.222 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="10.55" PeakHeight="454.058" Num="5" zHalfNm="408.319" Error="2.68">
-204.449 -67.287 33.1 -4.543 -0.718
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.161" Depth="0.154"/>
<TopsideChapman PeakHeight="454.058" PeakDensity="1380924.4" PeakScaleHeight="34.47" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
