<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 23:40:00.000"
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" >
2026.03.08 (067) 23:40:00</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">
FF202606703082340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.624" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.994" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="491.935" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="418.105" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="361.549" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.673" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.759" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.617" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.627" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="88.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 357.500 375.000 390.000 392.500 395.000 395.000 395.000 395.000 400.000 405.000 400.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 405.000 400.000 400.000 400.000 395.000 397.500 400.000 402.500 405.000 400.000 402.500 405.000 400.000 400.000 402.500 405.000 407.500 410.000 407.500 385.000 385.000 385.000 390.000 395.000 396.591 398.182 399.773 401.364 402.955 404.545 406.136 407.727 409.318 410.909 412.500 414.091 415.682 417.273 418.864 420.455 422.045 423.636 425.227 426.818 428.409 430.000 431.667 433.333 435.000 440.000 440.000 440.000 445.000 450.000 452.000 454.000 456.000 458.000 460.000 462.000 464.000 466.000 468.000 470.000 472.000 474.000 476.000 478.000 484.663 491.935 499.904 508.675 518.375 529.161 541.224 554.807
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 54 54 0 54 60 57 57 0 57 0 0 54 0 0 0 54 51 60 66 57 66 0 66 63 0 0 60 0 60 0 60 0 60 0 54 0 54 0 0 57 54 0 63 0 0 57 57 51 54 0 60 60 0 0 57 0 0 0 0 57 51 54 57 54 54 0 0 51 54 54 54 0 48 0 0 0 0 0 0 0 0 0 54 0 0 0 0 0 51 0 0 48 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.171875 1.171875 -0.390625 0.390625 0.390625 -2.734375 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875 1.171875 1.171875 -1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 -0.390625 1.171875 0.390625 1.171875 -1.171875 0.390625 0.390625 -2.734375 0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.953125 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 0.390625 1.953125 1.953125 1.171875 -2.734375 2.734375 1.171875 1.171875 -2.734375 2.734375 -0.390625 -2.734375 1.953125 2.734375 1.953125 2.734375 0.390625 -1.171875 -0.390625 -0.390625 2.734375 1.171875 1.171875 -0.390625 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="184">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.2 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.399 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.599 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 418.105 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.313 0.287 0.252 0.202 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.242 0.264 0.286 0.308 0.33 0.351 0.354 0.405 0.475 0.559 0.654 0.758 0.871 0.991 1.117 1.25 1.389 1.535 1.688 1.847 2.014 2.189 2.372 2.563 2.763 2.972 3.19 3.418 3.655 3.902 4.159 4.425 4.699 4.982 5.271 5.565 5.862 6.158 6.451 6.735 7.006 7.256 7.481 7.673 7.825 7.932 7.99 8.0 7.998 7.98 7.943 7.888 7.816 7.731 7.632 7.522 7.402 7.274 7.138 6.995 6.848 6.696 6.541 6.384 6.225 6.065 5.905 5.745 5.586 5.428 5.271 5.116 4.964 4.813 4.666 4.521 4.379 4.24 4.104 3.971 3.842 3.716 3.593 3.474 3.358 3.245 3.135 3.029 2.925 2.825 2.728 2.634 2.543 2.455 2.37 2.287 2.207 2.13 2.055 1.983 1.913 1.846 1.78 1.718 1.657 1.598 1.541 1.487 1.434 1.383 1.333 1.286 1.24 1.196 1.153 1.112 1.072 1.034 0.997 0.961 0.927 0.894 0.862 0.831 0.801 0.772 0.744 0.718 0.692 0.667 0.643 0.62 0.598 0.576 0.556 0.536 0.516 0.498 0.48 0.463 0.446 0.43 0.415 0.4 0.385 0.371 0.358 0.345 0.333 0.321 0.309 0.298 0.287 0.277 0.267 0.257 0.248 0.239 0.231 0.222 0.214 0.207

</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="8.0" PeakHeight="418.105" Num="5" zHalfNm="361.549" Error="3.523">
-189.69 -22.447 12.048 -1.563 -0.854
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.599" Depth="0.154"/>
<TopsideChapman PeakHeight="418.105" PeakDensity="794044.7" PeakScaleHeight="42.627" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
