<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 19:10:00.000"
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, F2 cusps do not match</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" >
2026.02.27 (058) 19:10:00</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">
FF202605802271910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.417" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.036" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.050" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="565.000" 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="2.715" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="389.009" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="282.967" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.594" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.400" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="139.919" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.378" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="73.517" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="177.900" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 261.667 263.333 265.000 266.667 268.333 270.000 271.667 273.333 275.000 275.000 275.000 275.000 275.000 275.000 280.000 281.250 282.500 283.750 285.000 285.000 290.000 295.000 295.000 295.000 295.000 298.750 302.500 306.250 310.000 310.000 315.000 320.000 320.000 320.000 325.000 327.500 330.000 332.500 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 410.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 455.000 457.500 460.000 465.000 465.000 465.000 466.667 468.333 470.000 470.000 475.000 475.000 475.000 475.000 480.000 481.250 482.500 483.750 485.000 490.000 490.000 495.000 495.000 500.000 500.000 500.000 505.000 508.333 511.667 515.000 515.000 515.000 520.000 522.500 525.000 527.500 530.000 535.000 530.000 537.500 545.000 550.000 555.000 557.500 560.000 565.000 565.000 565.000 570.000 574.367 579.377 585.181 591.986 600.073 609.845
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 0 0 0 0 0 0 48 48 0 63 48 57 57 0 0 0 60 57 63 54 0 0 0 51 0 0 51 60 0 51 63 57 63 0 60 0 57 57 69 60 69 63 0 54 54 63 48 60 63 54 63 63 72 60 54 63 72 66 69 66 72 72 72 54 54 60 57 63 48 51 63 63 69 63 69 69 57 60 63 57 60 57 48 0 69 57 72 57 0 57 0 0 66 69 66 63 69 66 60 0 57 0 57 60 54 54 54 45 54 51 51 0 0 48 48 51 48 0 0 0 51 51 42 0 45 42 48 0 57 48 48 48 51 0 0 45 45 42 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 -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 -1.171875 -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 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.4 2.45 2.5 2.55 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.000 95.000 95.000 98.333 101.667 105.000 105.000 105.000 105.000 110.000 107.500 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 115.000 115.000 115.000 115.000 110.000 110.000 110.000 110.000 110.000 105.000 103.750 102.500 101.250 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 66 0 0 57 60 0 60 57 0 60 0 0 0 63 0 57 57 51 0 0 54 60 51 57 0 51 54 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 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 -1.171875 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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.597 90.0 95.0 100.0 105.0 110.0 114.532 115.0 119.065 120.0 123.597 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 389.009 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.824 2.35 2.627 2.715 2.592 2.592 2.592 2.617 2.715 2.751 2.882 3.017 3.157 3.302 3.453 3.611 3.775 3.945 4.121 4.302 4.487 4.676 4.866 5.058 5.25 5.441 5.631 5.82 6.006 6.191 6.373 6.554 6.733 6.909 7.084 7.257 7.429 7.599 7.768 7.936 8.103 8.27 8.436 8.602 8.768 8.934 9.1 9.266 9.433 9.601 9.77 9.94 10.111 10.284 10.459 10.635 10.811 10.988 11.162 11.327 11.471 11.572 11.6 11.6 11.593 11.575 11.549 11.513 11.469 11.417 11.357 11.29 11.216 11.135 11.049 10.958 10.861 10.76 10.654 10.544 10.431 10.314 10.195 10.073 9.948 9.822 9.693 9.563 9.432 9.3 9.167 9.033 8.899 8.764 8.629 8.495 8.36 8.226 8.092 7.959 7.827 7.695 7.564 7.434 7.305 7.178 7.051 6.926 6.802 6.679 6.558 6.438 6.319 6.202 6.087 5.973 5.861 5.75 5.641 5.533 5.427 5.323 5.22 5.119 5.019 4.921 4.825 4.73 4.637 4.545 4.455 4.367 4.28 4.194 4.11 4.028 3.947 3.868 3.79 3.713 3.638 3.564 3.492 3.421 3.351 3.283 3.216 3.15 3.086 3.023 2.961 2.9 2.84 2.782 2.725 2.669 2.614 2.56 2.507 2.455 2.404 2.354 2.306 2.258 2.211 2.165 2.12 2.076 2.033 1.991 1.949 1.909 1.869 1.83 1.792 1.754 1.718 1.682 1.647 1.613 1.579 1.546 1.514 1.482 1.451 1.421

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.715" PeakHeight="110.0" Num="3" Error="0.0">
-29.936 12.327 -2.794
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.715" EndFrequency="11.6" PeakHeight="389.009" Num="5" zHalfNm="282.967" Error="2.547">
-220.415 -69.536 36.398 -14.803 2.944
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.597" Depth="0.123"/>
<TopsideChapman PeakHeight="389.009" PeakDensity="1669478.9" PeakScaleHeight="73.517" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
