<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.03.01 (060) 22:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003012230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.506" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.552" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="556.072" 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="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="445.270" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="389.964" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.425" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.529" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.770" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.345" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="94.340" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.280" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 381.667 383.333 385.000 385.000 385.000 385.000 385.000 385.741 386.481 387.222 387.963 388.704 389.444 390.185 390.926 391.667 392.407 393.148 393.889 394.630 395.370 396.111 396.852 397.593 398.333 399.074 399.815 400.556 401.296 402.037 402.778 403.519 404.259 405.000 406.667 408.333 410.000 410.000 415.000 415.000 415.000 415.000 418.333 421.667 425.000 426.667 428.333 430.000 430.000 430.000 430.000 435.000 435.000 430.000 435.000 435.000 435.000 435.000 435.000 440.000 441.250 442.500 443.750 445.000 445.000 445.000 447.500 450.000 450.000 452.500 455.000 455.000 460.000 460.000 460.000 462.500 465.000 460.000 465.000 465.000 465.000 470.000 475.000 475.000 475.000 475.000 475.000 480.000 485.000 485.000 485.000 490.000 495.000 495.000 500.000 501.667 503.333 505.000 505.000 510.000 510.000 515.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 535.767 536.674 537.765 539.102 540.776 542.937 545.830 549.905 556.072 566.497
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 0 54 60 0 0 63 0 0 0 0 0 48 0 0 0 66 66 0 57 0 0 0 0 0 0 0 0 0 0 0 63 0 72 0 0 69 69 69 72 69 72 0 0 63 0 0 60 57 66 63 51 54 54 63 57 69 0 0 69 0 0 0 69 51 63 0 66 66 57 66 69 57 60 66 0 57 60 66 66 60 0 63 66 69 63 60 69 69 72 69 69 66 69 48 0 0 60 69 69 66 66 63 66 63 69 69 66 63 69 63 66 60 63 60 60 51 60 54
</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 -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 2.734375 -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 -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 -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 -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 -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 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="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.12 145.0 150.0 155.0 160.0 165.0 170.0 174.239 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.359 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 445.27 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.271 0.225 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.228 0.252 0.276 0.3 0.324 0.347 0.354 0.412 0.487 0.562 0.638 0.717 0.8 0.886 0.977 1.072 1.172 1.277 1.387 1.502 1.622 1.748 1.879 2.016 2.158 2.306 2.459 2.619 2.785 2.957 3.135 3.32 3.511 3.709 3.914 4.126 4.345 4.571 4.804 5.046 5.294 5.55 5.813 6.083 6.359 6.64 6.925 7.211 7.493 7.767 8.023 8.251 8.433 8.554 8.6 8.6 8.589 8.556 8.501 8.428 8.338 8.232 8.113 7.982 7.841 7.692 7.534 7.371 7.204 7.032 6.858 6.681 6.504 6.327 6.149 5.973 5.798 5.625 5.454 5.286 5.12 4.957 4.798 4.642 4.49 4.341 4.196 4.054 3.917 3.783 3.653 3.526 3.404 3.285 3.17 3.058 2.95 2.845 2.744 2.646 2.551 2.459 2.371 2.285 2.203 2.123 2.046 1.971 1.9 1.83 1.764 1.699 1.637 1.577 1.519 1.464 1.41 1.358 1.308 1.26 1.214 1.169 1.126 1.084 1.044 1.006 0.969 0.933 0.899 0.865 0.833 0.803 0.773 0.744 0.717 0.69 0.665 0.64 0.616 0.594 0.572 0.55 0.53 0.51 0.492 0.473 0.456 0.439 0.423 0.407 0.392 0.377 0.363 0.35 0.337 0.324 0.312 0.301 0.29 0.279 0.269 0.259 0.249 0.24 0.231 0.222 0.214

</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="8.6" PeakHeight="445.27" Num="5" zHalfNm="389.964" Error="3.431">
-209.977 -50.55 25.093 -4.641 1.164
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="96.359" Depth="0.154"/>
<TopsideChapman PeakHeight="445.27" PeakDensity="917617.9" PeakScaleHeight="41.345" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
